Digestive system
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Transcript of Digestive system
![Page 1: Digestive system](https://reader036.fdocuments.us/reader036/viewer/2022070317/5564817ad8b42a73418b462b/html5/thumbnails/1.jpg)
By
Maya Cromwell, Robert Newman, Sean Bradley,
Zahra Syed
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• chemical • speeds up rate of chemical reactions •Ex: pepsin• Found in stomach•Ex 2: salivary amylase•Found in mouth Amazing Fact Time!
Each of your seventy five trillion cells is incredibly producing two thousand proteins each second
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Takes place when food mixes while chewing and mixed in our stomach.
Chemical digestion Breaks down large molecules of food
into different smaller molecules can absorb
Amazing Facts Time!
We eat about 500 kilograms of food per year
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nutrients enter the bloodstream and are circulated into the
body’s cells villi are covered with tiny, nutrient absorbing cells that
pass nutrients into the bloodstream.
Amazing Facts Time!It takes your mouth, esophagus, stomach, small intestine, large intestine, gallbladder, pancreas and liver just to digest a glass of milk.
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• Where it all begins•Chemical digestion• salivary amylase (saliva)•Mechanical digestion•Teeth
Amazing Facts Time!
1.7 liters of saliva is produced each day by the mouth
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Long tube connected to stomach Peristalsis Tube of toothpaste
Amazing Fact Time!
Muscles contract in waves to move the food down the esophagus. This means that food would get to a person's stomach, even if they were standing on their head
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Sac like digestive organ Md Churns food with muscular contractions Cd Digestive acids break down the food Mucus
Amazing Fact Time!
Within 2-6 hours, all food is emptied into the small intestine
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•Small intestine is a muscular tube that is about 2.5 cm in diameter•If you were to stretch it out, it would be about 6 m•The villi is located on the inside walls of the small intestine.•The duodenum is first part of the small intestine
Amazing Fact Time!
The small intestine is 19.7 to 23 feet long
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In the duodenum chemical digestion of Proteins Carbohydrates Nucleic acids Fat
Amazing Facts Time!
An adult’s stomach can hold approximately 1.5 liters of material
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Large intestine is larger in diameter than the small intestine
It is 1.5 m long and 7.5 cm in diameter It surrounds the small intestine
Amazing Facts Time!
the large intestine is approximately 5 - 8 feet in length
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In first part of emulsification, (total destruction), liver creates bile, then stores it in the gallbladder
The gallbladder squeezes out the bile into the small intestine where it breaks down food.
http://www.youtube.com/watch?v=j7GJcKuVGm8&feature=related
Amazing Facts Time!
After you eat, it takes usually between 24 and 72 hours in healthy adults for the complete process of digestion to occur
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The liver is to the left of the stomach
It is about the size of a size 3 shoe
Amazing Facts Time!
The liver performs over 500 functions
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Breaks down toxins like bile
Absorbs nutrients like a sponge with water
Amazing Facts Time!
Your liver can regenerate (re-build) itself. Even if only 25% of it is still healthy your liver can regenerate itself into a full liver again
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Is behind the stomach Has enzymes and bicarbonate
Amazing Facts Time!
There are approximately 9,000 taste buds on the tongue
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Enzymes break down carbohydrates through chemical digestion
Bicarbonate helps neutralize stomach acidAmazing Facts
Time!
In an average person, it takes 8 seconds for food to travel down the food pipe, 3-5 hours in small intestine and 3-4 days in the large intestine
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Stores, compacts and eliminates indigestible material from the body
Enters large intestine as a soupy mixture Absorbs most of the water in the mixture
and changes liquid into semisolid waste called feces or stool
Whole grain, fruits, and vegetables, contain a carbohydrate called cellulose (which humans cannot digest)
Bacteria help because they feed on cellulose
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The digestive system completes 2 life processes:1. Getting and Using Energy
2. Getting rid of wastes
Amazing Facts Time!
Every day 11.5 liters of digested food, liquids and digestive juices flow through the digestive system, but only 100 mls is lost in feces
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Gets and uses energy by taking in and storing nutrients
Gets rid of waste by breaking down food and getting rid of it through the anus
Amazing Facts Time!
Your liver consists of 96% water. (The water is inside the cells and in blood)
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burton.k12.ca.us villagemeadows.dvusd.org tutorvista.com
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Thanks for Watching!!!!!!!!!
Amazing Fact Time!The surface area of the digestive system is approximately equal to that of a singles tennis court