How your digestive system works – Emma Bryce
Across the whole planet, humans eat on average between
one and 2.7 kilograms of food a day. That’s over 365 kilograms
a year per person, and more than 28,800 kilograms
over the course of a lifetime. And every last scrap makes its way
through the digestive system. Comprised of ten organs
covering nine meters, and containing
over 20 specialized cell types, this is one of the most diverse
and complicated systems in the human body. Its parts continuously work in unison
to fulfill a singular task: transforming the raw materials
of your food into the nutrients and energy
that keep you alive. Spanning the entire length of your torso, the digestive system
has four main components. First, there’s the gastrointestinal tract, a twisting channel
that transports your food and has an internal surface area
of between 30 and 40 square meters, enough to cover half a badminton court. Second, there’s the pancreas, gallbladder, and liver, a trio of organs that break down food
using an array of special juices. Third, the body’s enzymes, hormones, nerves, and blood all work together to break down food, modulate the digestive process, and deliver its final products. Finally, there’s the mesentery, a large stretch of tissue that supports and positions all your digestive organs
in the abdomen, enabling them to do their jobs. The digestive process begins
before food even hits your tongue. Anticipating a tasty morsel, glands in your mouth start
to pump out saliva. We produce about 1.5 liters
of this liquid each day. Once inside your mouth, chewing combines with the sloshing saliva to turn food into a moist lump
called the bolus. Enzymes present in the saliva
break down any starch. Then, your food finds itself at the rim of a 25-centimeter-long tube
called the esophagus, down which it must plunge
to reach the stomach. Nerves in the surrounding
esophageal tissue sense the bolus’s presence
and trigger peristalsis, a series of defined muscular contractions. That propels the food into the stomach, where it’s left at the mercy
of the muscular stomach walls, which bound the bolus,
breaking it into chunks. Hormones, secreted by cells in the lining,
trigger the release of acids and enzyme-rich juices
from the stomach wall that start to dissolve the food
and break down its proteins. These hormones also alert the pancreas, liver, and gallbladder to produce digestive juices and transfer bile, a yellowish-green
liquid that digests fat, in preparation for the next stage. After three hours inside the stomach, the once shapely bolus is now
a frothy liquid called chyme, and it’s ready to move into
the small intestine. The liver sends bile
to the gallbladder, which secretes it into the first portion of
the small intestine called the duodenum. Here, it dissolves the fats
floating in the slurry of chyme so they can be easily digested
by the pancreatic and intestinal juices that have leached onto the scene. These enzyme-rich juices break the fat
molecules down into fatty acids and glycerol for easier
absorption into the body. The enzymes also carry out
the final deconstruction of proteins into amino acids and carbohydrates into glucose. This happens in the
small intestine’s lower regions, the jejunum and ileum, which are coated in millions
of tiny projections called villi. These create a huge surface area
to maximize molecule absorption and transference into the blood stream. The blood takes them on the final
leg of their journey to feed the body’s organs and tissues. But it’s not over quite yet. Leftover fiber, water, and dead cells
sloughed off during digestion make it into the large intestine,
also known as the colon. The body drains out most of the remaining
fluid through the intestinal wall. What’s left is a soft mass called stool. The colon squeezes this byproduct
into a pouch called the rectum, where nerves sense it expanding and tell the body when
it’s time to expel the waste. The byproducts of digestion
exit through the anus and the food’s long journey, typically lasting between 30 and 40 hours, is finally complete.
So, is there a GOD ?
Or… How to do caca.
Poop
No mention of the essential bacteria aiding you throughout the process.
So when i weigh myself at night I am 2 kilograms heavier?
Your information is very good. No one should go through this problem, in fact, my brother had this problem, then we got him treated with a good Ayurveda center Whose name is Planet Ayurveda. If you have this type of problem or any other type of health problem. you should go to Planet Ayurveda.
Others human system plz
嗨，大家好
Another wonder of God's creation.
Thank You!
Who else is Watching this at school?
|
👇🏽
God Created this
How about a video on antibiotics and probiotics?
Thank you.
Nice explanations
"HOW DOO DOO IS MADE"
Metric! Ugh!
It all starts with an EBT care and two big ole eyes……"hmmmm eva thing looks so tasty"
I need a smart person to explain how the digestive system evolved? And where did food come from? Language? How did we leave "ape-hood" to become humans when apes are still here?
Thank you for using metric 😃
Necesito para colegio
¿Quién más habla español e inglés aquí?
Greatness of God
3 hours ?, bruh mine takes 3 min 🤦🏿♂️🤦🏿♂️
Thanks it was soo helpful video 😊 😊 😊
I want a video about all the teeths and their functions and shape
And
Also more information about enzyme, ☺️
I swallowed a 1 dollar note. I told my doctor i feel fine but to to me to phone him if there is any change.
👍
oh ye a
Anyone here bcuz they have their test tomorrow??
Socio-economic and Political changes can improve/break the vicious cycle of malnutrition with specific nutrition and health intervention.
Click here for further information: https://www.youtube.com/c/MBRNDNutritionSkillsForLife
And people claim that this happened by accident😂….design is always tied to purpose. There is nothing that is designed that doesn’t have a purpose. Purpose comes first then design follows…. it begins in the mind…it is proof that there is a Designer. How can a “system” be made by chance?” All components work “together” for a goal…. even a child knows this…
Amazing video <3 we love you Ted-ed –
And we do this even without thinking about it
Pounds please
three-hundred-sixty-five kilograms of food per year? thats technology
No mention of the all important bacteria in this system that we require to survive…after all it is titled "how your digestive system works" …….what an oversight
I was waiting about the gut bacteria
very good
Next respiratory system
lol
Keep up the good work 👍🏻👍🏻👍🏻👍🏻👍🏻
Every time he says juices…
Yes, now i can learn science now.
Watching this video makes life easier
This is video is really helpful for me so if my science teacher ask me i can answer her
Ted Ed it's like our digestive system is like alive to me
Wow
USE THE IMPERIAL SYSTEM TOO
30 to 40 hours ? what ? impossible
very nice video
Very AWESOME boo
Helen.K
Well-presented, informative video! Check out the BIOL-O-GEE R.A.P. animated music video for a quick summary of the digestive system https://www.youtube.com/watch?v=VsihqvxpqOc
I watch a digestive system and already memorize it and our teacher asked what is digestive process i got the clap
(me: ohhh dont touch me im a genious) hahaha
Very interesting
Spell oesophagus right buddy
posted on my birthday!
Emma should be a rapper
I wish I didn’t have to go to school so I could watch these videos
Still atheism exists … !!!! ???
Like 👍 your video
30-40 hours?!?!
Hey u4qyty
yeet
Good morning
I literally learned more from this video then I did in a week with my grade 11 science teacher lol.
If you eat corn like crazy, your body will stop digesting it into poop, which means you can keep eating the same food again and again.
woah
I like the part where he poops
So basically what we poop today is what we ate last Sunday? I thought my poops are fresh AF!
Hi random people
Helped alot.. tnx
So, where do the proteins break down? The stomach or lower part of the small intestine?
Easy, understandable
good
This helps a lot
God is amazing
Nice video
Why is there no reference to the human gut microbiome – trillions of bacteria and fungi that inhabit our gastrointestinal tract, and have a major influence on our metabolism, body weight, immune system, appetite and mood?
Can’t understand atheists.who created this? Big Bang?
Anyone else eating while watching this?
Me: Watching while eating… next day: going to school Teacher: OKAY CLASS WERE LEARNING ABOUT THE DIGESTIVE SYSTEM! Me: nah I already learned it from YouTube 😎
clear, concise and helpful
much better than the way my study notes explain me !
My biology teacher used this in our class today as a reference, even though i'm in a non English speaking country
Stop speaking runditorian
Stop speaking runditorian
If you are reading this comment then I hope you have a better future and life and there is a goal I am seeking it I know this doesn't happen in one day but I am trying to become a successful YouTuber plzzz subscribe to help me so I have a better future, and have a wonderful day
Stools are poop!
LITERALLY
What causes gastroparesis? And how do I resolve it?
This is way funnier then copying facts from the smart board.I never even review them,but this I will always remembee
Allah the almighty said in Quran:
"Do they [then] wait for anything except that the angels should come to them or your Lord should come or that there come some of the signs of your Lord? The Day that some of the signs of your Lord will come no soul will benefit from its faith as long as it had not believed before or had earned through its faith some good. Say, Wait. Indeed, we [also] are waiting."
(QS. Al-An'aam 6: Verse 158)
Ted-Ed is the best
mispeld oesophagus
so poop is a solid and a liquid mixed together??!?
Bout to take a stool
vidio ini sangat membantu lebih mudah untuk dimengerti
Nice vid
1 000 000$ Production! Thank You TED-Ed
2:26 – muscular stomach walls beat down food? Um – ok… (thats not how it works)
this video was easy to digest