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1

Mechanical Digestion

physical processes like chewing

2

Chemical Digestion

breakdown of food by digestive enzymes

3

What are the four stages of food processing?

Ingestion
Digestion
Absorption
Elimination

(IDAE)

4

Ingestion

eating

5

Digestion

breakdown of food into small molecules

6

Absorption

uptake of the small molecules by digestive tract

7

Elimination

disposal of undigested materials

8

Hydrolysis

chemical reactions that break molecules using water and enzymes

9

The human digestive system consists of:

-Digestive Tube
-Alimentary Canal
-Accessory Organs (liver, gallbladder, pancreas)

10

What are accessory organs?

Dont physically digest food but produce chemicals to aid the process

11

Pancreas

Makes enzymes for digestion

12

Liver

Creates bile to break down molecules

13

Gallbladder

Stores bile

14

Chemical digestion begins in the...

Mouth!

15

Pharynx

connects the mouth to the esophagus

16

Esophagus moves food down through...

peristalsis

17

Peristalsis

alternating waves of muscular contraction and relaxation

18

Stomach turns food into a thick soup called

Chyme

19

Fluid in the stomach contains

Gastric Juice

20

Gastric Juice is made of

-Strong Acid
-Digestive enzymes
-Mucus
-The Enzyme Pepsin, which digests proteins

21

The Small Intestine

major organ for chemical digestion and absorption of nutrients into the bloodstream

22

Duodenum

first part of the small intestine.

Chyme from the stomach mixes with pancreatic juice and bile

23

Bile

Digestive juice secreted by the liver

24

The Large Intestine Consits of:

-Colon
-Rectum
-Anus
-Appendix

25

Appendix

contains white blood cells that make minor contributions to the immune system

26

Colon

absorbs water and produces feces

27

Rectum

stores feces until elimination

28

Anus

regulates the opening of the rectum

29

Appendicitis

bacterial infection of the appendix

30

What is the order for major parts of the gastrointestinal tract?

Mouth -> Esophagus -> Stomach -> Small Intestine -> Large Intestine