By

Maya Cromwell, Robert Newman, Sean Bradley,

Zahra Syed

• 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

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

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.

• 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

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

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

•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

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

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

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

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

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

Is behind the stomach Has enzymes and bicarbonate

Amazing Facts Time!

There are approximately 9,000 taste buds on the tongue

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

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

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

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)

burton.k12.ca.us villagemeadows.dvusd.org tutorvista.com

Thanks for Watching!!!!!!!!!

Amazing Fact Time!The surface area of the digestive system is approximately equal to that of a singles tennis court