Small Intestine: Structure, Digestion, Absorption

How can the stomach flu make us lactose intolerant? How do we absorb the food we eat? Learn how the small intestine has specialized sites to break down and absorb proteins, carbohydrates, nucleic acids, and fats

[@valentinaerazo]

'wait for it...sydases, nucleosydases' XD couldn't help cracking up thinking of barney from HIMYM. Excellent explanation, THANK YOU

[@nadiacharafi8815]

Excellent explanation, saves hours of useless lectures. Straight to the point, thank you

[@ilyasmasoud5334]

Thank you for clearing my doubts. .wonderful presentation !! God bless !!

[@StrahOfTheSundjer]

Did you know that starting a comment with an interesting fact grabs your attention instantaneously :D? Love it how you start your videos with fascinating facts!

[@anasluke3202]

Yup what mahira said thanks a lot your videos really help to raise veils of obscuring

[@MyMetallica12]

wow this is fantastic! Thank you very much for your excellent medical explanations Raja!

[@jamiesimko]

Thank you.

[@annadavao3376]

You are best!!!!super duper best!!!thank you for the vedio.

[@rashatariq5367]

thank u so much nice illustrations

[@puriyadanielwurtzyazdanfar9214]

Beautiful thanks. I was searching for somewhat who made an indepth video regarding this subject.

[@thebareessentials]

That was great. Thank you so much

[@masonstevenr]

fantastic, thanks!

[@valeriaperezarroyo6854]

Great!! Clear and well explained

[@penkatadrums]

wow this is amazingly great!!!! thank you man! much love! :)

[@stellanasseri9926]

amazing, thank you so much

[@window444444]

great vedio. I hope you can make more. It helps my bio 12 so much. Thank you very much.

[@bijugopalakrishan1426]

Thank you so much it makes my studies simple

[@augustusself8119]

Thank you Raja. I was originally just looking for a simple explanation, but you gave the full package =D

[@lorim8070]

Me too. This was great!

[@drakekason3928]

i guess Im pretty randomly asking but does anybody know of a good place to watch newly released series online?

[@sherryanntheodule5449]

Excellent presentation. Thank you.

[@jenniferrobinson6293]

Thank YOu!!! RN Student

[@shakhinajena7576]

Very nice to learn many things thank u dear

[@GatherYeRosebudsWhileYeMay]

This video is perfect

[@bytemebiz]

very informative .. break down and absorb proteins, carbohydrates, nucleic acids, and fats .. thanks

[@vanessaruvalcaba6584]

Very informative and well explained.

[@divyangijadhav5968]

Thank you so much sir🤗

[@duyen690]

Reminds me of khan academy! Great job explaining!

[@AliceLin03]

duyen690 i think it is from khan academy actually 🤔

[@chloefoon5992]

@@AliceLin03 yeah it is. He did it for Khan Academy so that's why it's on khan academy and here

[@alipppalippp2948]

Yess yaaa

[@roadtorecovery5104]

Man, that was incredible

[@hannahstudies8665]

Got more info out of this then my bio teacher... well I feel more confident passing bio test tomorrow

[@devendrapokhriyal5562]

nice explanation ...each and every word is easily understandable thanks ....

[@helenaho4165]

Awesome video!

[@abotala1550]

great work , very nice way and simple . hope you will continue doing this great work ! although there is somethings need correction like ( absorption of amino acid by primary ) actually it is by secondary active transport .

[@abotala1550]

abotala1550 need to be corrected *

[@MsJerkinbabe]

I have a biology exam tomorrow and this helped a lot!!

[@ThePilotUSA1962]

Hi Raja. Awesome video. I am learning more and more about nutrition and I have a question about Protein absorption. In 14:40 you mentioned that after proteins are broken down they will go thru blood capillaries and onto to the blood circulation. I was under the impression that before it goes to the bloodstream, amino acids would enter the Hepatic Portal System to be be first used by the Liver, then onto to the bloodstream. Am I wrong?

[@EdilsonJacobSilvaJuniores]

Thanks for the video! Very easy to understand. However, I think you made a mistake while talking about glucose absorption. If I'm not mistaken, after the glucose molecule enters the enterocyte, Na+ flows to the blood stream and K+ enters the enterocyte.

[@Dean1991x]

Really really good video!

[@edwardbliss8931]

Now I'm educated when I watch the beach scene in Saving Private Ryan

[@jessharrison2297]

This has helped with my biology homework so much! What did you use to create it? (app on computer or something?)

[@nutrifitzonellcalessandra9070]

super! good job

[@evanofelipe]

Very nicely explained - thanks

[@markmoore8387]

Would you happen to have anything on enteral feeding tubes and their locations in the small intestines?

[@lorim8070]

In an amazing way we were created. How could it just happen by chance?

[@kingzakiyano893]

Waaaaw that was very good teaching thank u very much i really like it

[@Karthikeyan-vr7vr]

thank you bro very useful to me

[@airisell1654]

Best video so far when it comes to digestion!!!! Brilliant job

[@neil9151]

saved my life

[@kapilnikam3172]

Nice presentation sir very helpful

[@user-eq2rf9gi2g]

Nice explain

[@grk5308]

nice informative video.

[@mahirahmariam]

Thank you so much for this, it was really very helpful ;) P.S - Your voice is SO cool LOL:D

[@kunzesdolma8353]

It's not his voice

[@Emma5ey]

Do you have a video explaining the stomach flu? I don't know if I have food poisoning or stomach flu or if there is even a difference... But I'm trying to understand what's going on with my body and why I'm vomiting and have diarrhea. Btw, great work! Very well understood and that's really impressive that you can write it all that way!

[@RajaNarayan]

Unfortunately I do not. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video.

[@kingzakiyano893]

Yes that is good

[@kpitonak]

What tool do you use for that marking and writing?

[@gapfenix]

Wonderful!!! Do you have more videos related to A&P or Anatomy?

[@crackedblackpepperandrocksalt]

I have one question please. I'm taking collagen supplement tablet form, silica supplement tablet form and another tablet for hair skin and nails. I take them on an empty stomach. but when I go to the loo it is plain to see the dyes and ingredients are being urinated away. how long does it tske for tablets to dissolve and be absorbed into blood stream. especially whilst taking apple cider vinegar.

[@aerasthoughts]

This legit explained better than my teacher Good job *insert school name*

[@vadankieffermea6287]

Nice it help me

[@akshardobariya]

Thxs brooo......Superb... (y)

[@haesungjun8496]

I though trypsinogen ----> trypsin was done by enzyme enterokinase, not enteropeptidase.-10:01

[@RajaNarayan]

Enteropeptidase = Enterokinase

[@sciencegeek0430]

Excellent!!!!! THANK YOU!! =)

[@burghygames]

I was looking for anatomy park

[@Rk.751]

bhai kamal kr rha tum..mantra ki trh uchharan kr rha hai..😁😁

[@cumspray6763]

Thx man 🌟🌟 Got through my digestion exam with this video. 2019 🌟

[@Mindoq]

nice

[@YY-wr5jt]

Why does fat go from lymphatic capillary to vein and then to blood capillary instead of going from lymphatic capillary directly to blood capillary?

[@gamefreak0838]

can you make more small intestines (if available)

[@duaimran1257]

The villi are in ileum right?

[@aahan_05]

OMG THIS HELP ME PASS

[@preettytamang1318]

Ua explaintion helped to some extent... But you carried on with duodenum, Jijunum n ilium ended only with an introduction.

[@rp5216]

Plzz translate it into hind...or simple English..plzz sir... otherwise it is fabulous...

[@oumaimahannaoui7214]

first of all thank u for the video it was really informative but i still have a question thou .. when the person suffers from diabeties does it mean that the pancreas will no longer secrete the enzymes responsable of the digestion °)°°°

[@meghanbeer1920]

When an individual suffers from diabetes (I am assuming you mean Diabetes Mellitus, or Type II DM), they have a relative deficiency of insulin that is unable to meet their body's need for this hormone. Generally, this is because obesity or some other related condition has caused a change in the insulin receptors, thus causing an insulin resistance. Whenever we raise our blood glucose levels (by eating, for example) our body releases insulin, which is responsible for transporting glucose into fat, muscle cells, or into storage as glycogen for later use as energy. Thus, if these receptors are defective or deficient, these patients suffer from high blood glucose levels and improper storage of glucose, causing a vast array of metabolic deficits.

[@oumaimahannaoui7214]

***** i get it now when the insulin is no longer secreted or the amount that is secreted is not sufficient that damages the whole process of metabolism . thanks for the response

[@dkoch1945]

So happy for the gentle quiet way you delivered this information. Thank you. Dkoch45

[@bulbazoth6473]

Everyone is lactose intolerant. Continual dairy intake forces our systems to compensate

[@lfcrags9715]

Is this GCSE level or A level

[@gulshinwari3420]

pepsin is a strong protein_digestion enzymes......why it does not digest the stomach walls......wch r mostly protein??

[@sumannnn]

+Gul Shinwari because it is released by cells in the inactive form - pepsinogen - which is not converted to pepsin until it comes into contact with HCl or active pepsin molecules. also the wall isnt broken down due to its thick layer of mucus :)

[@rockard94]

+sumanaachii you're right, and to add up, this thick layer of mucus you mentionned is mostly made up of epithelial cells not simply made up of proteins like op mentionned

[@definitelysix]

me can't listen

[@prlifter393]

you didn't talk about the Illeum....That is what i needed some info.

[@walls300]

please don't call it the stomach flu.

[@definitelysix]

your rong do you know where you're small intestines start the duodenum is the part of the stomach

[@doctork5200]

you have copied it from khan academy ...

[@sharvanthakur4465]

Please sir speak in Hindi

[@definitelysix]

I don't speak English

[@GGGG-hq4jv]

This guy's voice is totally distracting and too affected, maybe would work with blues clues

[@amethyst_nyx2768]

Better than some.

[@kirtiphulwani3289]

Indian??

[@shakhinajena7576]

👌👌👌👌👌👌👌

[@ishanjangir49]

Please correct your vocabulary skills.

[@ilyasmasoud5334]

Thank you for clearing my doubts. .wonderful presentation !! God bless !!

[@bytemebiz]

very informative .. break down and absorb proteins, carbohydrates, nucleic acids, and fats .. thanks

[@bijugopalakrishan1426]

Thank you so much it makes my studies simple