The Intestinal Villi Explained || Absorption

One of the functions of the small intestine is to take digested food molecules from the digestive system and transfer them into the blood, so that they can be transported to the parts of the body that need them. The digested food in the small intestine contains molecules such as glucose from the digestion of starch, amino acids from proteins, fatty acids and glycerol from lipids, as well as lots of other essential materials. These must be absorbed into the blood stream so that your body can use them.
The walls of the small intestine are lined with intestinal villi. And FYI, it’s one villus, many villi. Villus is singular, villi is plural.
The villi increase the surface area of the wall of the small intestine to maximise the rate of absorption of digested food.
Picture one flat line between points A and B, and image that material has to transfer across it. If you measure this line (the length of the surface for materials to transfer) you’ll see its 10 cm long. Now picture a line between the same points A and B, but on this new line there are finger-like projections all the way along. If you measure along the surface of this line, you’ll find it’s far longer than 10 cm. The version with the projections has a larger surface area, meaning more material can be transferred in the same amount of time.
Here’s a simplified diagram showing a single villus. Food molecules are transferred from the central space in the small intestine into the villi.
The epithelial cells of its lining have many microvilli on them. This further increases the surface area.
Villi have a good blood supply constantly flowing in and out through many blood capillaries. Most materials are transferred to the blood capillaries. There’s also a structure inside each villus called a lacteal, and the products of lipid digestion are absorbed into this part, and from there they’ll also eventually reach the blood stream at a different point.One of the functions of the small intestine is to take digested food molecules from the digestive system and transfer them into the blood, so that they can be transported to the parts of the body that need them. The digested food in the small intestine contains molecules such as glucose from the digestion of starch, amino acids from proteins, fatty acids and glycerol from lipids, as well as lots of other essential materials. These must be absorbed into the blood stream so that your body can use them.
The walls of the small intestine are lined with intestinal villi. And FYI, it’s one villus, many villi. Villus is singular, villi is plural.
The villi increase the surface area of the wall of the small intestine to maximise the rate of absorption of digested food.
Picture one flat line between points A and B, and image that material has to transfer across it. If you measure this line (the length of the surface for materials to transfer) you’ll see its 10 cm long. Now picture a line between the same points A and B, but on this new line there are finger-like projections all the way along. If you measure along the surface of this line, you’ll find it’s far longer than 10 cm. The version with the projections has a larger surface area, meaning more material can be transferred in the same amount of time.
Here’s a simplified diagram showing a single villus. Food molecules are transferred from the central space in the small intestine into the villi.
The epithelial cells of its lining have many microvilli on them. This further increases the surface area.
Villi have a good blood supply constantly flowing in and out through many blood capillaries. Most materials are transferred to the blood capillaries. There’s also a structure inside each villus called a lacteal, and the products of lipid digestion are absorbed into this part, and from there they’ll also eventually reach the blood stream at a different point.
____________________________________
MUSIC
Natty Roadser - JR Tundra
Noble Dub - Silent Partner

[@sarangadbb1728]

we need more teachers like you

[@shabanasafair9852]

oh my God thank u so so much i have a test coming up in next week and i was struggling to understand this surface area thing but finally i got relief well explained straight forward into the info Thank u so much!

[@mrjothescholar1149]

Very direct, informative, 'clean' , well made video! Thanks a lot for the amazing content! :)

[@hananeid8117]

He explained the part that i didnt understand so good i dont even know what to say THANK YOU!

[@Science_Sauce]

Happy to help. What was the bit you didn’t understand?

[@hananeid8117]

How does villi increase the surface area😅

[@pumezanjokweni2478]

Surface area part,understood after 17yrs, tnx!South Africa

[@RandomMan10]

holy shit this is underrated, my teacher took 1 whole class to explain it while you look 2 mins

[@psychodekko]

the fact that you used "holy shit" lmao 💀

[@ghazalharris9320]

❤

[@ahsacadmey9377]

We need teachers like you not like the ones who explains a small topic in 5 hrs !!!

[@jennalloyd2436]

Thank you so much! this was incredibly helpful.

[@carolynliezleeinso2032]

I came across to your YT Channel and I love your videos! It can help me explain in more detail to my students. I hope you can make videos for mitosis, meiosis and photosynthesis. Because these are the most complex topics in Biology here in my country. Looking forward to your new videos, especially the three aforementioned topics! Thank you, Alex!

[@Hgghging]

try mrs estruch she covers everything in detail and images

[@teacherwill3542]

Ohhhh it makes sense now, the villi and microvilli. So technically microvilli are cellular structures while villi are still visible to the naked eye. Right? This content is really helpful!

[@MAgaRianX]

Hi, this is so much helpful. Can you please do more on these topics please: Osmoreceptor Nephron ADH Alveoli gas exchange How cardiovascular and respiratory system works together Endocrine system

[@OwenCasper-t7h9k]

Great video!!!!

[@fitzestrada836]

good job!!!!!!! 10000000000000000000 stars must give for you!

[@chandakokadwar9767]

You have explained the topic very nicely

[@ramanjitkaur3124]

Thankyou sir❤

[@Science_Sauce]

You’re welcome

[@aishuubashir7735]

School is much better here😂😂

[@kamlakant3410]

It is better but it gives more information Ok!👍

[@kefiloemoutlwatse3174]

Facts 😅

[@Atomicnerd597]

Agreed

[@chadiolabi1313]

😂😂

[@Avocado223s]

Fr

[@hungrykids9678]

Nice explanation ❤

[@AnitaYadav-vc8kn]

Thanks mujhe samajh ne ke laye kyo ki mujhe english mein samajh Atta jai

[@催催-u9d]

Thank you so much for making things so easy to understand

[@zainabfurqan9715]

Best channel ❤😊

[@imtired1683]

Great video!! It didn’t really cover absorption through the villi as I was hoping to see more on microvilli. Great animation though; keep up the good work!

[@ImanFatma-u3r]

Amazing 😍

[@Beanheershir]

thank you this really helped me with my homework

[@julianabot5594]

Made me understand better... thank you sir

[@romaroy6300]

Thanks for your explanation 👍 It helps me very much

[@IsaacMuchiri-bf3tv]

very helpful ❤

[@otubee3524]

i like your explanation thanks alot

[@Jason-o5s]

Cheer~~the process or action by which one thing absorbs or is absorbed by another.

[@Lia_prongs]

Dude you are saving my life 🙏🙏

[@iqraabid3053]

Very nice

[@selenanieto8152]

Great video!

[@Forgotten250]

I might need this soon when im in year 8 or 9

[@verina.shenouda]

This video helped me understand my lesson, thank you!

[@nour2698]

Thank you so much

[@Anonymous-ce9wx]

Sir.. if intestine is covered with mucus then how the nutrients make it to the villi? Does food molecule have to pass through mucus and then to the villi??

[@motiwalahanif5498]

Now my concept Is Crystal clear

[@cocodaydream4198]

thanks!

[@brianacuevas8680]

so direct!!!!!

[@smitaasoni]

Thank you :)

[@Science_Sauce]

You’re welcome

[@MuhammadMuhammad-ws4ro]

Its amazing it helped alot b Thanks English man

[@XuZitongAdmiraltyps]

What is the link for this video

[@ghadeeralkhateeb2943]

This was so helpful, thank you.

[@فتاةعارية]

الأميرة لامياء

[@StaySane89]

I want to use this video for educational purposes. Can I?

[@sonamjaiswal8375]

V nice explained but no one can beat peekaboo kids ❤

[@thegoodnawal5489]

Thankssss help alott

[@Murk104]

Yea, but you didn't tell what are different point of junctions of blood capillaries and lacteal

[@marymmoon1190]

What ileum then

[@DreamHome-r4s]

Ileum is adapted to absorb the digested food back to blood. Ileum has villi in it to provide it with large surface area. Just think a towel to be Ileum and the tiny-bitty hairy like things as villi which helps to rub water from your body just like villi do to supply digested materials to blood (as surface area is more)

[@kprcht]

I like everything only with sauce, now i like science

[@jyscoo.edit..]

Thanks for the helpful content :🇮🇳🇮🇳

[@preetigokavi146]

Thanks I could not understand it now I understood

[@trishamukherjee2647]

Thank you so much sir.

[@Abhinavkumar-og3xd]

Please make video of class 8 science icse board.

[@TheSilentRambler]

These vids are great :)

[@TheSilentRambler]

true

[@Fourthbugbear]

@@TheSilentRambler fr

[@sobanasubramani6683]

Very informative videos

[@skrrtdemion8215]

thank you

[@hidarahemath2576]

Thanks 👍

[@humayrahima5723]

thanks

[@kevinr3533]

What I don’t understand is why you didn’t mention anything about saturated fat, which is why we have a gallbladder designated to push the bile out when we digest saturated fat that is the main purpose of the gallbladder. How you can determine this is because majority of people now are getting their gallbladder taken out because of the gallbladder stones they’re getting because we have idiots telling us not to eat saturated fat. We are designed to eat red meat and saturated fat that is why we have the gallbladder that is the main purpose. Why didn’t you mention anything about that does not fit with big Pharma and the agriculture narrative is that why you didn’t mention it very odd

[@GILsussus9]

How about the digestions of amino acids and glucose?

[@GILsussus9]

I meant absorption

[@bera9919]

can you please make a video about countercurrent blood flow in vili?

[@refinedmanhood00]

Hey u! Stop looking at the comments and focus on villi

[@sivarishi9639]

❤

[@atharvcs7647]

The thumbnail of villi drawing os very sis 😂

[@annaic]

you’re just immature..

[@varshini_14]

Good 👍 simple explanation 👌 From India☺️

[@happylifeonearth4760]

Mai papa ke mobile se padh rahi hu

[@Abhinavkumar-og3xd]

Please speak in hindi.

[@Science_Sauce]

Sorry I can’t speak Hindi.

[@Abhinavkumar-og3xd]

@@Science_Sauce please try to speak hindi. I understand hindi more quickly.

[@dasg212]

​@@Abhinavkumar-og3xdTu hi english sikh le. Wo especially tere liye hindi thodi na sikhega😅😅😅😅

[@aratigupta1558]

​@@Abhinavkumar-og3xdplease 🙏 learn english..

[@aratigupta1558]

You'll understand it more quickly😊

[@annakaybishop7542]

The small intestine

[@StratTwo-s9y]

Youre Scottish right?

[@ReetaGujjar-re9co]

Thanks but speak in hindi ❤❤

[@Science_Sauce]

Sorry I can’t speak Hindi

[@domenickelly9297]

the narrator is a true daddy, HMU plzzzz

[@KiyaRafiee-n6t]

I hate school

[@AkhileshKumar-m9b6d]

2 minute ke video ke pahle 29 minute add de lo 😂😂😂

[@LovelyCat-zc1ue]

😂😂

[@Poke-fan6391]

Viiiiiiiiiilllllllllliiiiiiiii

[@kprcht]

What do you mean by saying villi

[@hamzaalabadi2517]

lol

[@TharunRamesh-cs8iv]

😮😮😢😢 waste of time