Hearing & Balance: Crash Course Anatomy & Physiology #17

[@paramveerdosi]

this guy has covered the whole syllabus of my 11th and 12th grade biology in about 47 videos ,he is a genius

[@DeathShock28]

it's way more precise and is literally what coaching institutes like akash and allen teach....i am saying from my experience

[@thenerdyartist3324]

can I just say that this channel has absolutely carried me through my senior year exams thank you so much

[@bigmike8586]

BRUH

[@nissi2711]

Big Mike what

[@tulip8586]

@@nissi2711 "Bruh", as in, he agrees

[@allanochoa4826]

we meet again CrashCourse, I've had you for biology, anatomy, and now physiology .

[@aydenboire]

Allan Ochoa Anatomy and physiology is the same series

[@frankchen4229]

@@aydenboire and in some universities, they are different courses :/

[@RxlredE]

@@aydenboire how are they same? Anatomy is structure and physiology is function. They both are very different subjects.

[@linashellee]

@@RxlredE the comment said 'series' of crash course video and not subject

[@imsingle9226]

😂😂 exactly my condition now

[@ahasiikuyu8001]

HANK IS ALWAYS HERE WHEN I NEED HIM, WHAT A LOVELY LAD

[@tomazlm_]

Hello, Crash Course! Contrary to most neurons in the body, hair cells in the labyrinth depolarize with an influx of potassium, not sodium (mentioned at 6:50). This strange behaviour is due to the peculiar potassium-rich composition of endolymph, the fluid that surrounds the cells inside scala media.

[@sumph1]

I was taught that as well

[@Wildchild_Lau]

you are right

[@ssymck]

+Tomaz Lima i was wondering as well! Thanks, spares me hours of browsing =)

[@paristonhill532]

thanks you just saved me sir (Y)

[@bobbill577]

Tomaz Lima I

[@mohammedosamy9676]

I'd like to say that you Hank Green are a genius especially at delivering the info. I am a second year medical student and your crash courses rock! I won't forget this favor you're doing to all of us learners ever!!! Keep up the splendid work!!!

[@jodiekosky5963]

Pretty sure I should graduate my degree from Crash Course rather than my university...

[@benschamberger8933]

Same

[@MegaPills1]

Literally going to take a A&P exam in half and hour and I only studied using his videos.

[@chantelspence7767]

mine's in about 5, and yeah this series taught me so much more

[@jamesgallagher4304]

This Episode was corresponded with my professor, so yeah! Valid stuff!

[@MarcoCastilloWorld]

Good one!

[@bellafinney3318]

Step 1: click on video Step 2: pause Step 3: adjust playback speed to 0.5 Step 4: continue

[@RxlredE]

To 1.5

[@monikajalota5286]

It is just my opinion here.......... But I think his speed and voice are just fine

[@hm7369]

I tried this and got so stressed when I changed it back to normal speed

[@hm7369]

@@RxlredE living life on the edge, are we?

[@monirayusuf30]

Thanks

[@SydDante]

Weird how this was uploaded on the day my father woke up with sudden hearing loss (already has real bad hearing in both ears, with hearing aids) and it is accompanied by dizziness. Watching this put me at ease, I'm going to show this to him tomorrow, Thanks CC!

[@saintxio]

YES! I ACED THIS SEMESTER OF A&P 1!! Thank you so much for putting these up.. I've probably listened to them 1000 times to get an easy to remember version of all the stuff I've crammed in my skull. Thank you thank you thank you! I hope you'll continue with A&P2 topics.. your videos are a miracle for humanity

[@graceh5272]

I found this video helpful in learning more about the ear. I actually have severe hearing loss with 70% in my left and only 40% in my right. Its because when I was born, I was born with less of the tiny hairs in your cochlea than a normal newborn has. In other words, I was born with a 30 year olds hearing and got a head start on my loss. This video actually taught me more about sounds and the ear, things that I didn't know already! Thanks Crash Course!!! I love your channel so much!

[@beatrizbarros7237]

you've helped me enter med school and now you're making it easier for me even in here....thanx Hank!

[@ilangated]

Why sensory conflict makes us barf wasn't explained in the video, so here's why, in case anyone wants to know: Conflict in sensory interpretations can be the result of ingesting something toxic. Because of this, our species has evolved to vomit when we experience sensory input, in case the cause is something poisonous.

[@z121231211]

PotatoGhost The brain assumes just about every imbalance in it to be the result of a poison. Probably a great trait to have back then but it's why "nausea and vomiting" are common side-effects in drugs now.

[@unvergebeneid]

z121231211 Which kinda proves that it works because "chemicals affecting your brain" is exactly the kind of thing that this system is supposed to detect :)

[@MitchSandoe]

PotatoGhost damn! ya beat me to it haha. I just learned this in my hemodynamics class.

[@RizwanKhan-os1pt]

SuperNazoBros. Wow!!! Thanks and love for sharing this 💚💚💚

[@shafferpeters4845]

It Makes the liquids for balance in your ear get messed up and you could get vertigo and stuff

[@liwendiamond9223]

I once had the misfortune of experiencing what it's like when you sense of balance is disturbed by sneezing too hard. My brain suddenly start believing that THE ENTIRE WORLD WAS SPINNING. It felt like I was constantly falling sideways, but also down to the floor. Then when I was on the floor, I felt as if the world was trying to drag me on the floor and ceiling at the same time. Needless to say my brain was like "What the fuck is going on, physics aren't working anymore" For an agonizing 4 minutes, I felt like the reality was spinning on itself, which gave me a crushing headache so intense than dying would have been preferable to this sensory shitstorm. Fortunately, after about 2 ish minutes I felt the spin was slowing down and recognized that whatever it is that was disturbed in my inner ears was returning to normal and after about 4 minutes everything was back to normal again. The headache subsided after about 30 ish minutes. From that experience, I can assure you that balance is the most important sense of them all and should never be messed with. You can live, admittedly with some difficulty, with impaired hearing, vision, smells or tastes and even without touch, which is actually the second most important sense, but balance? Our brains are just not meant to function without it. The pain is too intense. We would all commit suicide within the hour or maybe we would just shut down from the mental strain. I don't know, but I never want to experience that ever again. Holy crap that was crazy.

[@antonioscendrategattico2302]

Ouch. I once vomited from too much spinning so yeah, I'm pretty sure we wouldn't even be able to keep our meals going in the right direction without it.

[@chevmonk5363]

People with meneries disease or other balance disorders can experience vertigo as you just explained but for hours to days ive seen cases of it lasting 6months yes i agree it is definately up there with one of the worst diseases what is mors unfortunate is theres no cure and we are yet to figure out or get remotely close to solving it so yea awareness would be great

[@yassienE4935]

yesterday and before yesterday I had vertigo for 5 mins because my ears popped while sneezing

[@sirenia1241]

@@chevmonk5363 I had vertigo for an entire week.

[@durva8296]

hard to put into words how grateful I am that a channel like CrashCourse exists! you're amazing! thank you!

[@xXTheturtlehutXx]

So is going deaf basically just going bald in you’re cochlea?

[@rugayaabaza3941]

For anyone watching this, the mechanically gated channels in the hair cells are POTASSIUM AND NOT SODIUM

[@MusicalMali]

This video made my day. Not only is it incredibly informative, but also very entertaining! Thanks for alleviating my anxiety with both knowledge and humor.

[@abigailhaverty2093]

I love your show. My dream is to be the female bill nye, or you. lol!! You rock man. Thanks for helping everyone study and learn!!!

[@brettknoss486]

Not Bill Nye. His show was annoying, and he wants to lock up people that disagree with him.

[@ijustwannacommentnotmyreal9814]

Abey Crabby the Science Nerby

[@Supernova-217]

best of lucckkkkk!!!! be you!!!!

[@whitedragongaming123]

BILL NYE THE SCIENCE GUY!!!

[@321beth321]

I like how David Bowie pops up when it says the Labyrinth @ 4:22 . I love that movie.

[@valerie20112]

Yea

[@bellad5968]

nice profile pic *potassium intensifies*

[@silentandsmooth]

I almost guarantee there is a blooper of Hank stumbling over "Beeping, barking, and Beyonce" 2:03

[@tinatanner244]

Hank/Crash Course are the best!! Very entertaining while providing a complete clear explanation of each topic.

[@bookishletters]

As an audiology major, this made me happy.

[@stevenortega143]

Nowadays teachers cannot teach right. I find myself going to KZbin countless times. If I could pledge more than the minimum to fund CrashCourse and essentially protect free eduction I would. The very first CrashCourse video immediately surprised me with the high quality information and style. This is something that's worth finding and I hope CrashCourse reaches their goals for the foreseeable future.

[@hkgs_knight4216]

I thought I'd stop using crash course in my a levels but here I am during my degree! Thanks for the useful vids

[@eliotcougar]

Yessssss... Sensory conflict is awesome... Something humanity has to get rid of in the future...

[@ivanroaaravena7623]

This video is excellent! All though one of the greater differences between endolymph and perilymph is that in the endolymph (the fluid inside the membranous labrynth) the most concentrated cation is potassium, not sodium as you pointed out so what actually goes into the organ of Corti is potassium. Love your channel!

[@gailhowardfinney723]

These "Crash Course" segments really help me put the stuff I'm learning in class together when I start to suffer from Info-overload! Thanks so much!!!! :)

[@joeyambrose3112]

Your videos about the senses have helped me so much with my science fair research paper and note cards, you are a literal life saver because without out this it would have taken a very long time to do and it could ruin my future. Thank you

[@natashapike5835]

Thank you so much for your videos! I have a biology exam in two weeks and your videos are helping to translate the nonsensical explanations in my text books!

[@bethisabee]

I loved learning the stuff to do with hearing in physiology, as someone who experiences hearing loss (and dyspraxia - which has something to do with loss of balance) I found it fascinating! Stereocilia (hair cells of the inner ear) and how they can be damaged or structured differently gives way to hearing loss, because there is some disruption of the potassium action potentials between the stereocilia that in turn creates an action potential (or not) to send to the brain to be processed. Biology is weird, but gives me so much insight!

[@onlyvinvictus]

I'm training to become a Corpsman in the navy as of now I watch you videos to better understand the body even more. Thanks!

[@I-MonkMode]

Gotta love Crash course. So much to learn.

[@grndragon7777777]

I'm glad most crash course videos have over a million views. Spread the knowledge

[@matthewthompson6159]

As others have noted (a long time ago), the Na+ influx should be amended to K+ influx at 6:50. (Love your videos by the way). It would be great to see these videos evolve hierarchically to link to more detailed videos of subcomponents covered here. Another entire video could be done solely on the sound source localization afforded by ITDs, ILDs, and the pinna and the amplification in the ear canals while introducing acoustical physics. Then another one on just the middle ear including the stapedius and tensor tympani muslces and their protective nonlinear effects on transduction into the cochlea. Then another 5 or more on everything that happens in the cochlea, like the stereocilia, tip links, tectorial membrane, and the activation/inhibition of the mechanically gated channels. Basically, I see this channel evolving into a encyclopedic web of related videos going into whatever depth the current frontier of a field has consensus on. NBD to pull that off, right?

[@nerilynbesario8651]

I seriously learned so much watching your videos than my actual professor

[@maxhjermstad6710]

Excellent video, as always. The Green brothers definitely know how to make videos that are both entertaining and informative. I do have a small critique, though: personally, I would have split hearing and balance into two different episodes. Although both are tied to the anatomy of the ear, we receive sensory data about balance from far more than just our ears. This was implied with the discussion of sensory conflict (if we only have one sense contributing to our balance, there can not be sensory conflict), but it's important to note that the amount of balance-related information we receive from nerve endings in our feet, for example, dwarfs the amount of balance-related information we receive from our ears. All in all, the video was great, but I would have preferred a more extensive discussion of balance, which I happen to find fascinating.

[@senecamontezdeoca3434]

The coolest intro on KZbin

[@jessieHORRIFIC]

I had an ear tumour that damaged my incus bone, so it was removed! I had to wear a hearing aid for a year before I had a replacement bone. Woop!

[@FlyingJetpack1]

***** It's very small, so it shouldn't be too crazy But replacing the bigger bones that have things connected to them is a problem. The ear bones are so small, and have no tissue connected to them so replacing them isn't impossible.

[@sydneychipman651]

+FlyingJetpack1 They actually have muscles connected to them, tensor tympani muscle and the stapedius muscle. The tensor tympani is has neural pathways that are responsible for the dampening (when a noise is too loud, a signal is sent to the tensor tympani so you can dampen the sound making it less loud). Hope that's helpful.

[@FlyingJetpack1]

Sid Vicious That's actually interesting :o

[@_.chxrmz]

lol XD

[@lewisho8114]

Are u lying

[@linua2009]

I have a test over this in 2 days and this video was posted right on time. Thanks!!

[@kamelkachin7848]

Thank you a lot for this free education. Very helpful and funny.

[@Eeeff]

There's so much more interesting information regarding the processing of auditory information in the brain that you missed. This episode definitely needs a second part.

[@tomomishore5738]

Awesome stuff. It's amazing to know this if you've actually had hearing problems like me. Mine was a decently large hole in the tympanic membrane that caused it to not catch low volume sounds and certain frequencies. I still have some trouble and can't hear some frequencies that people my age usually hear, but I'm fine because I had surgery to repair my eardrum. It started because my physician put in a tube to let out the fluid behind my eardrum because I constantly had ear infections. I love your videos guys! Good job :)

[@Raydog07]

Best videos on youtube. Thank you, Hank, for helping me with my Psychology Degree! Crash Course for life.

[@chrissy07girl]

i am so glad I found these videos. it is making studying for a and p easier and more fun. i am going to add that I learned cranial nerve 8 as vestibularcochlea. anyways these videos are helping me better understand content for a and p

[@ArakkoaChronicles]

I rarely remember much after these videos, at least in technical details. I'll tell you "there's this stuff that looks like a snail and it's got a membrane inside that vibrates and sends electricity to your brain", but words like "cochlea" are likely to escape my head nearly as fast as said vibration. BUT, I still watch it because every video makes me astonished how amazingly complex all the programming inside our bodies is. Think how much work would a human programmer have to put in to make a machine interpret all those vibrations and movements to give a realistic sensory reception... and our bodies just automatically make it on its own. Simply amazing.

[@fragmaster101]

Verroak Krasha The human body is the ultimate machine ;)

[@KuwaCraft]

I love how my brain is processing this lesson on how i'm hearing this video. Everything that he is saying is going on instantaneously.

[@crazytothemax]

Hank is my hero. These videos are a god sent for my A&P classes.

[@Chillitz]

just thought this would be an appropriate time to say thank you for having the captions available! my ears are shit :(

[@mattjankowski7568]

+chillitz They also seem to not appreciate it when I blast crash course form the library computers.

[@gourabjitsingha8056]

the semicircular canal bulges into a structure at the base called ampulla which primarily has the steriocilia attached to the hair cells which helps in the detection of 3 types of head movement(mentioned at 8:13 ) and then comes the otolith organ that has two types of organ namely sacculi (for vertical movement) and utricle (for horizontal movement) (mentioned at 8:19 )

[@thatgurl277]

And they say that science and religion do not go together. How can you listen to this, look at how much detail is put into simple processes like hearing, and not believe in a creator? Our God is amazing!

[@kailincarr9602]

These videos have taught me more and better than any classroom I have sat in.

[@AaryaGhuge]

Everyone talking about how this channel got them through their senior college years Me: having to study this as a 14 year old

[@onetwoBias]

You should have included the vestibulo-ocular reflex, knowing how the vestibular system is crucial to the ability to have stable vision, is pretty mindblowing :)

[@nevermind1627]

I love your channel and of course the way you explain things, you made it more clear than most of my teachers

[@djangoworldwide7925]

This is a great summation of a semester worth course. There is no way i would've understand this without prior knowledge but hack, this was great! Also I am happy to realize I learned just a bit tiny more than the material in this video (hair cells are divided to inner and outer, each their own functionality). Great vid anyway

[@teresaivarson5428]

These videos are going to be the reason I pass my A&P final

[@Kjohnson5250]

I'm taking a neuroscience class right now and this is super helpful! Thanks Hank!

[@muntazeerreja9458]

I laughed so hard when he just went crazy on revolving chair

[@JD96893]

wikipedia is a great source for stuff like this, but this just sums everything important up so well in just 10 minutes.

[@salomonflamenco7162]

Crash course philosophy Also cool opening

[@zachpreachuk576]

Yes please

[@chord2140]

And physics! Oh, how I love the three Ps. Psychology, physics and philosophy.

[@VexylObby]

Salomon Flamenco Who would host it? I will do evil things to take that spot.

[@salomonflamenco7162]

VexylMusic Well I read comment (I forgot who put it, sorry!) that said it could be both John and Hank and they could talk about it and than discuss the pros and cons and I thought that was a really interesting idea. They could use this youtuber Philosophy Tube or Wisecrack

[@emperorjustinianIII4403]

Salomon Flamenco That was my comment, mate. An interesting and awesome Idea, not?

[@bobbyebissette2232]

Hot damn. This should be required viewing for every human! Bravo!

[@vxidwvlkxr]

You mentioned Grind-Core. I love you. xD

[@colinxiong6423]

Great video. A correction to hair cell depolarization; it's actually a potassium influx that causes the cell to depolarize. It is one of the few sensory cells to use potassium instead of sodium.

[@RoadmapToOneMillion]

Great video. Really helped me in my A&P course. Thanks for posting!

[@skylitroom]

Thank you so much! I'm in college and preparing for an exam tomorrow, and this really helped.

[@mariakal605]

idk y but the little bone vibrating at 3:14 makes me laugh so much

[@ijustwannacommentnotmyreal9814]

mariaarakal gosh SAME I sent this video to my friend and told my friend to watch the video from the same part hahaha *highfives*

[@irina26loki]

ik why. because u're an f-ing perv!!! i was ok before i read this, and now i can only laugh too when i see it!!! shame on u!!!! :(((((

[@amrzein9949]

mariaarakal ha ha ha NOT FUNNY BRO I KNOW WHAT U THINK'en😒

[@christie2242]

Why is it necessary for the inner ear (tympanic cavity) to amplify the external sound waves? (3:25) Sound travels faster through liquid than air, according to v = √(B/ρ)

[@devikaathauda4387]

Feel like i wasted time on tution. This is both clear and short while a 4 hour clz couldn't teach me half of this

[@HorizonIncarnate]

Lol his guitar says "This Machine Pwns Noobs". Perfect 👌

[@professorm5338]

Really big thank you for another brilliant video. So accurate and to the point, and full of excellent information particularly for the biology a-level.

[@MeleeTiger]

Breaking it down like that helps to make it more understandable how some people can have perfect pitch in terms of being able to precisely identify pitches as well as most machines designed to do so can.

[@crashcourse]

Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App! Download it here for Apple Devices: apple.co/3d4eyZo Download it here for Android Devices: bit.ly/2SrDulJ

[@faresgh6820]

Hey, thank you for all the effort ☺️ Are you going to do this with all the other videos ?

[@kaylacarrillo4125]

Im taking a test today about this in my Junior level college class. This was more helpful than my teacher has ever been. THANKS GUYS

[@Woodenfan]

Will we be getting into sensory system diseases sooner or later? I hope you guys do, this section of A & P speaks to me personally, having a hearing loss myself :)

[@wt4629]

How do you watch these videos then

[@Offensivebunny]

The West Will Rise Again! Subtitles

[@Woodenfan]

Yeah, I get this often. Having a hearing loss is not the same as being deaf. I can hear, just not that well compared to others. I have hearing aids, but I use a really nice noise-muting headset nowadays for my computer needs ^_^

[@TheCatsReflection-me]

Woodenfan was about to ask a similar question. i though this would have been a great opportunity to explain a little about vestibular disorders as well as hearing loss.

[@Woodenfan]

Like I said, I hope they get into that :) There's different types of hearing loss as well, so yeah

[@supsma9983]

74 + slides of reading summarized into 10 minutes. THANK YOU.

[@jordannixon4308]

It opens Potassium (K+) channels not Sodium (Na+) channels. I was really loving this video up until that point.

[@med8615]

Why would it open (K+) gates? That doesn't cause an action potential but instead makes the inside of the neuron more negative and even further from the threshold voltage needed to trigger these impulses.

[@med8615]

Oh nvm you're right... :3

[@bobbyvanmali8493]

The auditory system is different in terms of the way that it depolarizes because it uses K+ instead of Na+. The fluid outside the cells of the organ of Corti (in the scala media) is highly concentrated in K+. When the mechanical receptors on the hair cells (movement of cialia from vibrations of the basilar membrane) it opens K+ channels. The large chemical gradient (high K+ outside, low K+ inside) causes an influx of K+ ions that depolarize the cell causing activation of the Voltage-gated Ca2+ channels which promote the release of synaptic vesicles. This activates a neuron (in the auditory nerve) which synapses at the cochlear nucleus. Another thing I should point out is that the membrane as shown in the video makes it appear like there are hair cells on the basilar membrane, this is not true. The way that the signal propagates is through a vibration of the basilar membrane, however, it is from the narrow stiff base (high frequency vibrations) of the membrane that incrementally gets wider and floppy (low frequency vibration) as it approaches the apex of the Cochlea.

[@claytonmoorman]

Jordan Nixon i literally just asked the same thing before reading below. We good like that

[@thiagosindra]

I was about to make the same comment but realized someone would have noticed that too.

[@EmuOtori414]

I have learned a lot about the ear but when I watched this I learned much more

[@katierozsa]

Will we go into hearing losses??

[@whitedragongaming123]

I had a set of systems to memorise for an exam and Crash Course explained ALL of that

[@claytonmoorman]

i thought it was K+ that allows for the depolarization of the organ of corti in the cochlea rather than Na like you mentioned. can someone clarify?

[@julissarios9882]

yeah its K+ he made a mistake

[@s0ulcandy777]

these videos help me on my tests in AP psych so much!!!! thank you!!!!

[@torietam7474]

Woah. Today is May 4. This was posted exactly 5 years ago 😳 damn, I didn’t plan this

[@dr.mahmudulhasantopu8021]

u guys r awesome!!. um a student of final year in medical college, u guys what showed in 10 mins,it took 2 days to study when I was in 1st year. great job!. really appreciated

[@HienNguyen-zy4wx]

Potassium in the endolymph depol hair cells, not Sodium pal. Also depol by K+ open up Ca+2 voltaged gated channels, which lead to the release of neurotransmitters, which then stimulate the auditory nerve. Still love your vid

[@lawrencecalablaster568]

Hien Nguyen We just learned this my physiology class :)

[@MZOURI8]

The best education channel on youtube.

[@sheepwshotguns]

when our ancient ancestors first started evolving to come on land, did their ears have to make any significant evolutionary changes to adapt from water to air? can these remnants of these changes be seen today?

[@Linkous12]

sheepwshotguns I'm pretty sure our tiny inner-ear bones are remnants of parts of the jaw bones of our fish/amphibian ancestors. I think that only answered part of your question, though.

[@TheAlgerietop]

Don't use we, my ancestors were no fish ^^

[@xCaNu414x]

TheAlgerietop lol

[@kalixkatt]

Yes.

[@theshaunsta]

Matthew Davis you cant just assume that. They were designed perfectly to aid in hearing not a product of time and chance

[@northfalmouthacademy5645]

Yay!!! We love the guitar playing. Another amazing sensory systems video. Are we pushing our luck to ask you to release Sight ASAP?! We

[@northfalmouthacademy5645]

North Falmouth Academy All kidding aside, I want to thank you for producing these wonderful videos. My middle school students can't wait to see what you put out next. The quality and depth of the lesson combined with Hank's winning personality and "sense" of humor are World Class. John's coverage of the ancient world is amazing as well!!! We

[@MimmiEkman-h2i]

More specifically, the brain concludes that moving while sitting still doesn't make sense and thinks you probably ate something wrong and now you're poisoned, that's why it wants you to throw up!

[@heatherhays7895]

whoa.. love these videos. I can read material all day, but to have the explanation and the picture/video makes all the difference in the world for me! Thank you!

[@sarahdarwiche4965]

You're just hilarious, and cute, and the best

[@power-max]

So our ears do fourier transforms sound waves!? Awesome! That also explains why a lot of audio creation (music), manipulation, and compression is done in the frequency domain, instead of the time domain.

[@paco8009]

Like John Green Comment for Hank Green! Like and comment for both! Have a good day :) love you both

[@paco8009]

Both :)

[@bluerosario4559]

Ahmed both!! xD

[@bluetannery1527]

Hank :3

[@princesbeautyswooz9678]

TooGood c;

[@amiama3729]

Both :)

[@TheZoeBig]

hearing is pretty amazing. so complex. very well produced video.

[@kuntamdc]

What if you're upside down? Doing a handstand, orrrrr spinning on your head? Is there research about how the liquid reacts. I imagine, if you're spinning on your head, due to the acceleration, the liquid hugs the walls of the utricle and saccule, like the way most liquids in spinning containers do. Awesome!

[@danyc4779]

Thank you for helping me pass my college anatomy and physiology class 😭❤️❤️

[@jessicamarie6686]

It opens K+ channels not Na+ channels on the hair cells :)

[@benaaronmusic]

Yeah! Science of sound. Glad your tour went well, Hank. ROCK ON!

[@gtagtagtagtag]

I am having a quizz tomorrow on the vestibular system and suddenly this video pops up. is it a sign?

[@CasperJoosten]

Mina Ihab Yes, it is a sign. A sign that clearly CrashCourse is watching you. Did you notice that van that seems to appear everywhere you go? They are following you, watching you. They know your schedule and your classes. They know everything!

[@gtagtagtagtag]

Casper Joosten omg that scared me

[@gtagtagtagtag]

anyway I got A on my quizz at least that's thing

[@Nilguiri]

Mina Ihab Aye, It's a sign that sometimes coincidences happen.

[@Nilguiri]

Mina Ihab Aye, It's a sign that sometimes coincidences happen.