Digestive System

Join the Amoeba Sisters for a brief tour through the human digestive system! This video will address major structures and functions including the esophagus, stomach, small intestine, and large intestine. This video also mentions chemical and mechanical digestion as well as some digestive vocabulary.
Table of Contents:
00:00 Intro
1:30 Ingestion, Digestion, Absorption, Elimination
2:06 Mouth
2:54 Esophagus
3:34 Stomach
4:36 Small Intestine
6:00 Large Intestine (Colon)
6:26 Elimination
6:53 Accessory Organs in Digestion
7:43 Disorders in Digestion
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REFERENCES on HUMAN DIGESTIVE SYSTEM:
Zedalis, Julianne, and John Eggebrecht. “25.3 Digestive System Processes - Biology for AP® Courses | OpenStax.” Openstax.org, 18 Mar. 2018, openstax.org/books/biology-ap-courses/pages/25-3-digestive-system-processes.
Urry, Lisa A, et al. Campbell Biology. 11th ed., New York, Ny, Pearson Education, Inc, 2017.
--------------------------------
FURTHER READING SUGGESTIONS
On Platypus Digestive System:
www.ncbi.nlm.nih.gov/pmc/arti...
royalsocietypublishing.org/do...
www.nationalgeographic.com/sc...
www.smithsonianmag.com/smart-...
On Venomous Spur in the Platypus:
pubmed.ncbi.nlm.nih.gov/22899...
We mention specialized cells can develop a mucus layer - and that they divide frequently - which can be protective for the stomach lining. However, there's more! Did you know many enzymes (like pepsin) are secreted in an inactive form and don't activate until reaching a different location? Learn more below!
www.scientificamerican.com/ar...
Learn about Hormones Involved in Human Digestion:
openstax.org/books/biology-2e...
Learn about Disorders of Human Digestive System:
www.niddk.nih.gov/health-info...
--------------------------------
The Amoeba Sisters videos demystify science with humor and relevance. The videos center on Pinky's certification and experience in teaching biology at the high school level. Amoeba Sisters videos only cover concepts that Pinky is certified to teach, and they focus on her specialty: secondary life science. Learn more about our videos here: www.amoebasisters.com/our-videos
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MUSIC:
Our intro music designed and performed by Jeremiah Cheshire.
End music in this video is listed free to use/no attribution required from the KZbin audio library.
COMMUNITY:
We take pride in our AWESOME community, and we welcome feedback and discussion. However, please remember that this is an education channel. See KZbin's community guidelines and how KZbin handles comments that are reported by the community. We also reserve the right to remove comments.
TRANSLATIONS:
Hindi Subtitles Credit: Alisha Aggarwal
Chinese Subtitles Credit: 字幕由Sharon Shanz Chan翻譯
While we don't allow dubbing of our videos, we do gladly accept subtitle translations from our community. Learn more here: www.amoebasisters.com/pinkys-... We want to thank our amazing community for the generosity of their time in continuing to create translated subtitles. If you have a concern about community contributed contributions, please contact us.

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I love how most of us are high school students that found this channel in bio class and now watch their videos in our free time

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I’m a middle school student and don’t have bio haha 😂!

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Yep. Well actually i'm a college student

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And when the world needed them the most, they returned.

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they're more reliable than the avatar

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I sincerely hope all is well, I pray for our sisters. I pray God keep them in great health and joy. And give both strength for the bad times. Amen 🙏

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LOL

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Still helping me in college level anatomy/physiology. Thank you Amoeba Sisters!

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same!

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Me too

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A&P uni student here, these videos are incredible at laying essential foundational knowledge on which to build more advanced knowledge.

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Nursing major here and yep I second that

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same here !@@Jocimar-gx7fd

[@andjelatrkulja2715]

KZbin, please recommend this channel to more people and save them on the exams!

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I’m a medical student now and still watching your videos since I was 10th grade!!! Thaaaank you 😍😍😍😍

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SAME

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I have been watching them since 8th grade

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This is just one of the best science channels I have ever seen. The channel needs more subscribers, to be honest.

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Came here a few years ago to help with my science classes, still here after I graduated (high school) because I now have a genuine interest in science, and great love for your videos 🥺

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This channel has been carrying me through college microbiology, chemistry, and anatomy. You guys are a god send!!

[@kj989]

Never clicked so fast 😂 I love you Amoeba Sisters

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Sameee

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Haha, me neither!

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same

[@mwahbysxfaa]

Same😂

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i had to study all the material for my test in 2 days and these summarized videos really helped me you're doing a remarkable job!! thank you.

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Same, but I only have one day...

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I'm doing the same thing

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me but cramming 1 night

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Fr same

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I literally don't know why or how, but me and my brother only get science videos by the amoeba sisters! Thanks you amoeba sisters for basically saving my grades!!!

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My son found your videos and has taking a liking to them. He is 5.... reading through these comments makes me realize most these people are high-school or college students...

[@armageddon845]

I managed to make it into college without taking a Biology class, which was probably a mistake. Now I have to take a Biology class when my last experience with Biology was in 7th grade. Luckily, your videos make it a lot easier to take in the material. Thank you! You're a life saver.

[@luciaxochimitl8391]

You have to add subtitles in spanish, I live in Mexico and students will go crazy for your adorable videos. They really help me understanding some concepts. Keep on the good work. Thanks.

[@ishaann2334]

They added them 😇

[@mwahbysxfaa]

They added it

[@ayaya123]

Amoeba Sisters, I always watch and love your content of videos it makes my learning in science and biology easier!

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simp

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@@theoverreactor8731 hater

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@@theoverreactor8731 Mad?

[@Rexxster_editz]

same

[@AudreyThePanda]

mrs. rapini i appreciate u sm!! u taught bio to me freshman year at my high school (not sure if you want the name to be disclosed) and i’m so happy to see how far you’ve gone!!!! i’m in college now and i love seeing kids in hs bio bringing you up. you are a game changer

[@AmoebaSisters]

Thank you so much for completely making Pinky’s day!

[@manyabhanti9197]

you're so lucky i'm so jealous .-.

[@leif6111]

@@AmoebaSisters well I’m incapable of getting indigestion so I’m always hungry

[@elistervowelles]

Me: sees you made new video Also me: the digestive system?! Yay! I'm one of the few people who enjoy the digestive system

[@jakobyarns4369]

i think the esophagus, intestines, and stomach are tasty too!

[@mwahbysxfaa]

​@@jakobyarns4369omg yhh

[@mariajew]

You guys helped my cousin to become a nurse. Thank you so much, Amoeba sisters! :'(

[@mwahbysxfaa]

:]* ur suppose to be happy why u sad

[@elmomagicalworld8176]

Thank you Amoeba Sisters. I am currently working on a digestive system project in which I have to make a piece of food travel through he digestive tract. Watching this video really helped me understand which directions to take. I love how you included even the tiniest details like the epiglottis and the chyme. I appreciate you a lot. Thanks again!!!

[@chopin6087]

Who’s here cuz they are having a test/quiz?

[@stephaniesei5098]

In 30 minutes

[@chopin6087]

@@stephaniesei5098 good luck!

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Pls its our semi-finals tomorrow and I need this.

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Amoeba sister is back with another video . Yaaaaaaaaaaaay

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I can't emphasize just how much i love this channel

[@HannahWasserman-qd1wj]

Here in 2024 as a junior in college. Thank you amoeba sister for getting me through elementary-college science!!

[@estroberri6587]

I just recently overcame a few digestive issues that have been occurring for about a week. What a coincidence that this comes out as soon as I recover!

[@ghostfluff8140]

I can't wait to give this video to my students(who don't speak Danish), it will help them learn.(don't want them to fall behind) It's absolutely perfect for them, you girls did an amazing job.

[@lovleger]

i just stumbled your channel. I am a nursing student taking pre-requisites at the moment. Your clear explanation coupled with the anime characters make it easier to learn such one of the most complex system of the body. . Subscribed. I will be here a lot more often. Thank you for all your hard work, Sisters

[@velociraptorblue8394]

My school made me watch some of your videos to do assignments, and when the school tells us to watch a video, it’s usually boring and nobody wants to watch it. But I gotta say, I’m glad that the school made me watch your videos because they are actually very fun and informative. I will actually continue watching your videos after school on my free time. Great job on your videos! 😃

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Yay more videos!!!❤️❤️❤️ I’m in Bio 202 (the second part of anatomy)!!! Your videos have truly helped to get to where I’m at today😊😊

[@CookienSonicStudios]

Thank you so much for uploading these videos; I know you see comments like this on all of your uploads, but we all mean it!! I feel like I will succeed in Science thanks to you guys!! Please don't stop uploading, and I thank you for your efforts!!

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JUST DISCOVERED THIS CHANNEL! ITS A LIFESAVEERRRR

[@user-ip6iq3in6t]

I absolutely adore this video. It has helped me gain a much better understanding of systems. My heartfelt gratitude goes out to the talented Amoeba Sisters for creating such a masterpiece.😍😍

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I am 22 and wholeheartedly love watching the Amoeba sisters... they make me happy

[@dailydoseofmedicinee]

The stomach is the widest part of the digestive system. It not only digests food, it also stores it. According to the BBC, the stomach can hold a bit more than a quart (1 liter) of food at once. The design of the stomach allows a person to eat a large meal that can be digested slowly over time.👍

[@raresubstance]

I sincerely hope all is well, I pray for our sisters. I pray God keep them in great health and joy. And give both strength for the bad times. Amen 🙏

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[@CJ-nn1nd]

This is AMAZING!!! thank you for making learning anatomy fun ☺️

[@VaniaVictoria_]

Nursing student here been watching u guys since high school..love the videos! Thanks so much!

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Even though I already graduated college, it's good to see something I watched from middle school still around.

[@bleepy9551]

This was 9 months ago what???

[@8a02dhrititanna8]

U know what tomorrow is my test of biology on digestive system and I wanted to see your digest I've but it wasn't uploaded..... Now it's very easy for me learn it because your animation s are so nice and easy and voice that everyone can understand and now this chapter is so easy for me thank you so much amoeba sister s to upload this video on the right time....... And ome more thing..... U know what my teachers in school also show us videos of this channel as recap or start of the chapter...... WE LOVE YOU AMOEBA SISTERS

[@HA-yc5bb]

YESSSS PLEASE DO MORE ANATOMY VIDEOS.... I’ve been watching Ameoba sisters since I started my GCSE’s and now I’m studying Dentistry and I still watch their videos! Thank you so much❤️

[@salsabeelwael5665]

hahaha I was just stydying this part in our lesson bec my exams are coming and I had some problems with it but u coincidencely upload this video like LOL haha..... oh and thx 4 ur efforts it's reallyyyyyyyy appreciated ❤❤

[@squiffy7559]

Ik same exact thing happened with me

[@SarahMayCTALCO]

Thank you Amoeba Sisters! such a great help!!

[@spiderboy..]

you explained better then my teacher thankyou amoeba sisters

[@mucinovelasquezmayra923]

Great video that easily exemplifies that if there is any problem in the absorption phase, various complications will occur that can result in intolerance, inflammation and irritation of the mucosa that covers the entire small intestine, since the villi will not be able to absorb all the necessary nutrients and This can trigger serious malnutrition and other autoimmune diseases.

[@saharasif2059]

You don’t even know how helpful ur KZbin channel is like seriously because of COVID situatuons our schools were closed throughout the year and still we are giving our olevel exams so I watched all ur vids and gave my Mock in which I got A* which is unbelievable ur animations and the way u describe every concept is mind blowing thanks for everything ♥️♥️♥️♥️♥️tysm😭♥️♥️♥️♥️

[@barbaram7535]

PERFECT TIMING! I am working on putting together an online lesson for Health and PE about the Digestive System. THANK YOU!!!!

[@user-yb5uz6hh2g]

This is the funnest channel about learning I’ve ever found 😂😂😂

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I just came back from my first day of irl school My teachers killed me with homework And it was one notification that saved my sanity Love from India

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My bio teacher told us about you and I mean, look at the quality of your videos!

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honestly, you sound like my biology teacher at high school and i feel nostalgic

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Let’s go the amoeba sisters number 1

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I graduated college already yet here I am still watching the Amoeba Sisters lol!

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Yeaahhhh😀😀......my distant amoeba teachers are back with their lecture 🎉🎉 Love you guys❤️❤️

[@jyotidevi4937]

I am an elementary school student, and I'm loving this!!!!

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This channel is a life saver!!

[@hopegabawa673]

Im on my 2nd year degree, and you guys are literally saving my Uni life 😂😍

[@AmoebaSisters]

We have a free resource that complements this video! Look under "Digestive System" on the alphabetized list near the bottom of our handout page www.amoebasisters.com/handouts Expand this comment for clarifications! We think the points here are helpful. Please expand this comment: 1. A great question helped us see something we want to point out. We mention at 6:21 that the large intestine's *major role* is the re-absorption of precious water (as well as it being home to many beneficial bacteria). That is correct BUT we don't want to start a misconception that water doesn't also get absorbed in the small intestine - because it does there too. In fact, a larger percentage of water has already been absorbed by the small intestine by the time it gets to the large intestine. But the *major function* - as mentioned by the video - of the large intestine is reabsorbing precious remaining water. 2. When we first mention elimination, we also mentioned the word "excrete" as well when describing it. We've been exploring this, because we note that some sources specifically use "excretion" *only* for metabolic wastes but some sources (like OpenStax, a peer-reviewed biology source we tend to cite) actually use "excretion" to describe the elimination of feces from the rectum. [Source: openstax.org/books/biology-2e/pages/34-1-digestive-systems ] *Since this seems to be a point of inconsistency among different sources, we've decided to clip out the point where we mentioned the word "excretion" and just use elimination since this word encompasses both.

[@gigachad7729]

When are you making your 3 hour long video raving about platypuses?

[@swindbarishal3993]

Hey, I just wanted to say that in my textbook, there are 5 phases in mitosis. They are prophase, pro-metaphase, metaphase, anaphase, telophase. But your video has 4. I can't understand which one is right or if both are right. Also, HI PETUNIA AND PINKY! Edit: I'm a 2021 student, so don't think I'm some old guy talking about books from his day. I don't live in America though, so the textbooks could be kinda different? Help!! the profile pic is my dad.

[@queenmeiika1]

Please continue to cover all of the human systems. We love you guys

[@pinkpanda4404]

@@swindbarishal3993 Try asking your teacher because it really depends on what kind of answer they want. I remember in one of my college classes, me and some other students were trying to figure out what the right answer was for some question, since the internet had a different answer to our class notes from the professor. And our professor wanted us to go with her answer instead of the computer's.

[@user-qd2qe8cn5q]

Make video on Fungi too or kingdoms animalia mammalia

[@travisg0108]

Thank you so much Amoeba Sisters! This has helped me to understand this subject so much better! 😊

[@dontdisturb5815]

This channel's videos makes me happy and relax when I'm feeling down.... blessings of Biology!

[@waplle5104]

OMG thank you so much! Amoeba sisters just from watching this video I learned so much about the human digestive system Thank you!

[@shiram88]

This was cear and fun, thank you! I love your creative way of demonstrating. It makes the lesson fun to learn and not boring 🙂👍

[@limna452]

THIS IS SO COOL. I LITRALLY HAVE A BIO TEST ON DIGESTIVE SYSTEM TOMORROW. THE NOTIFICATION CAME UP LIKE A MIRACLE.

[@AmoebaSisters]

We hope you ace your test!!! 🎉

[@dkwinters16]

Love this channel, my teacher showed my class last year and I now email her whenever y’all post a new video, hope her new class will like this channel as I did!( had her last year)

[@jenniferrodriguez8889]

Thank you for this video, Amoeba Sisters! Very nice animations and most importantly, very helpful explanations!

[@nohemitrevino1177]

I have an oral exam for my science class on the digestive system and came to KZbin because I wanted the know the function of the liver, gallbladder, and pancreas. You guys are so good at explaining things, and usually in other types of these videos, I'll zone out or have to rewatch clips to fully grasp what's being said, but the only reason I'll have to rewatch anything in your videos is when I see a funny cartoon and didn't quite see what they all said in the text boxes. I love your videos!!

[@dailysamira]

how was it

[@cindysarjusingh9912]

I always love all your videos. They make learning fun and keeps me interested. Thank you for another amazing video.

[@AZConcertGirls]

As a nursing student … I think this is a cute video and contains a lot of information in a nice light fun way! Thanks for posting!!’

[@napiltree5917]

The new intro is so cute!

[@jiyaurvi560]

Hiiiii😊 I am new to this channel But your videos are so fun and informative By the way I am from India and I have an exam the day after tommorow I was searching about digestive system and found many videos ,but , none of them were so informative I understood everything that you explained and which is written in our book Thank you so so much ☺️

[@mansolly8224]

I'm just waiting for people to say stuff like "POV: your teacher sent you here", and "who is watching this in med class"

[@deathstroke8639]

Don't remember having to learn about the digestive system in your general bio class. Most likely it will be med students coming here

[@ireneflores8770]

@@deathstroke8639 i'm a junior in high school and this is what i'm learning in my bio class atm

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@@deathstroke8639 and apparently there are lots of middle schoolers in here lol

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My teacher did and im still in elementary but im learning this 😔

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Current medical student and love these videos for big picture understanding!!!!

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I’m studying for my ATI TEAS exam and omg your videos are so helpful 🤩 thank you so much ❤️

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Hooray, a new video from the amoeba sisters! Thanks for doing these. Keep up the good work!

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who else is here bc ur science teacher showed you this

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I love your videos, they're really fun and informative. Thankyou for creating them!

[@couchpotat]

8:29 a platypus riding a horse *tear* its so beautiful

[@xanna1722]

GRACIAS por este increíble video, hacen un gran trabajo.

[@suiyru_san8692]

even though your giving an overview it's so amazing to listen to you teach this jogged my memory pretty well

[@hannahneale6514]

please make videos of each body system! seriously these videos are amazing, I am obsessed!

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I love science!

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Omg sameeee!!!

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I hate my science classes but not when they are teaching the topic digestive system ...... 😂😂😂😂😂

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Loooove the careful explanation...always the best...keep up the great work amoeba sisters...we depend on you

[@SilverGhost2004]

This channel has saved me so many times in Biology

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guys following you since you, stopped due to Petunia's leave you explanations always helped me with my mid school and high school biology keep rocking love from INDIA !

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Your mitosis and meiosis videos helped me a lot you guys make the best content on KZbin. You deserve unlimited subscribers.

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ive probably written this comment a thousand times but u literally saved my biology grade, THANK YOU

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my dietician showed this in a nutrition class and it is so stinking fun to watch!

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This is the cutest video I’ve ever seen! 😂❤ “my precious” with the jars of bile - brilliant work!

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Hello!!!! just discovered your videos!!! so nice and simple to understand!!! thank you very much!

[@achieversinlife]

Thanks Amoeba Sisters for this amazing video.This helps me a lot for my high school study .❤

[@divyansh22b]

At 2:06 u said 'excreted'. It's correctly called 'egestion' since excretion is removal of waste products of metabolism, excess materials in the body, or toxic substances, but egestion involves substances that couldn't be digested (e.g.: Fibre). Yes but it does involve some amount of excretion (from liver/gall bladder i guess), but still it will be better to refer it as *egestion*. Btw great video!

[@alexa_ludick]

Your videos are literally the best and have helped me so so much, thank you!!

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The DJ Ivan really came in solid ! Thank you !!!

[@saharqureshi5873]

So happy you guys are back i have a bio test next Monday

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This is amazing my science teacher makes us watch u guys all the time. U guys are amazing!

[@CA4UX]

thank you. 100% on my test

[@scienceislove2014]

I love how you explain a middle school level concepts and link post graduate level "further reading"s

[@ipfocusx2646]

Amoeba sisters, Cognito and Khan academy are the 3 channels which help me with my biology.

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This channel singe handedly saves my Biology exams

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My teachers have always used your videos in class you’re both very incredible

[@alissarxy9652]

Omg i was so excited for this video Thx guys I appreciate all the hard work you do for us Love u 💓