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Chapter 39 digestive system

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Chapter 39 digestive system. Nutrient. a product or compound that gives energy for living things to function and live. digestion. digestion breaks down nutrients. It is a chemical process that relies on enzymes and acids starting in your mouth to your stomach to your small intestine.

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Presentation Transcript
slide1

Chapter 39

digestive system

slide2

Nutrient

a product or compound that gives energy for living things to function and live.

slide3

digestion

digestion breaks down nutrients. It is a chemical process that relies on enzymes and acids starting in your mouth to your stomach to your small intestine

slide4

calorie

A unit of measure that tells us how much energy is in the food or nutrient

slide5

esophagus

This tube lies behind

the trachea (wind pipe).

It connects the mouth

to the stomach. No

digestion takes place.

Wave like motion

move food from the

mouth to the stomach

slide6

stomach

It looks like a small bag or sac. It is below the diaphragm. By moving and churning food and adding stomach acid, it breaks down food to prepare it for the small intestine, where the body can absorb nutrients

slide7

amylase

This enzyme is found in saliva. It begins to breakdown food, especially carbohydrates

slide8

duodenum

This is the first part of the very long small intestine. The pancreas, liver and gallbladder give (secrete) enzymes to break down food into particles that the body can absorb

slide9

gall bladder

The gall bladder is a very small muscular green colored

sac that is connected to the liver. The gall bladder stores bile until it is needed in the small intestine.

slide10

pancreas

The pancreas is a leaf shaped organ located below the stomach. It makes insulin and pancreatic enzymes to further break down nutrients in the small intestine.

slide11

liver

The liver weighs almost 3 pounds and is about the size of a football. It is located under the diaphragm on the right side of your body and crosses into the middle. The liver makes and oozes (secretes) bile. The liver and pancreas are important in keeping your blood sugar constant.

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small intestine

The small intestine is anything but small, since it averages 19 feet long! The body absorbs nutrients through the villi and bloodstream in the small intestine. Food particles stay here about 3-6 hours. About 10 liters of food and drink pass through the small intestine.

slide13

villi

These are located inside the

small intestine and look like tiny hairs.

There are thousands of them and they

absorb nutrients and waste

from cells in the body.

slide14

large intestine

Also known as the COLON, it is much shorter than the small intestine, but is bigger around. The colon is about 5 feet long. It has 3 straight portions. No digestion takes place here, but rather solid waste moves to be let out of the body

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a

p

p

e

n

d

i

x

The appendix is 4 to 6 inches long and is located

where the small intestine and the large intestine

join in the lower right side of your abdomen

Some theories say it stores

bacteria to help you after being sick,

Others say it is a use piece of tissue

which has no function.

slide16

rectum

The last part of the colon. It is 6 -8 inches long. It

connects to the anus to expel poop.

slide17

anus

The end of the line in the

digestive system. The rectum

is above it.

slide18

bile

Bile is made in

the liver and is a

green enzyme

which helps to

break up fat.

slide19

pepsin

Pepsin is an enzyme that is part of the

gastric fluids which break down proteins

so the body can use it.

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