32.2 Digestive System

Sponge #8Word Bank

Anus

Esophagus

Gallbladder

Large Intestine

Liver

Mouth

Pancreas

Salivary Glands

Rectum

Small Intestines

Stomach

1

2

3

4

5

67

8

9

10

11

32.2 Digestive System

mouthSalivary glands

esophagus

stomachliver

gallbladder pancreas

Large intestines Small intestines

anusrectum

32.2 Digestive System

KEY CONCEPTThe digestive system breaks down food into simpler molecules.

32.2 Digestive System

•In 1822, Alexis St. Martin was shot in the stomach and treated by William Beaumont, an army surgeon

•The bullet had left a small hole in his stomach

•Beaumont persuaded St. Martin to let him observe the digestive process by tying foods to string, putting them into the stomach, and observing how the food was digested

32.2 Digestive System

The digestive system is a collection of organs that breaks down food into energy that can be used in cells

mouth

esophagus

liver

gallbladder

large intestine

small intestine

rectum/anus

32.2 Digestive System

32.2 Digestive System

mouth

esophagus

liver

gallbladder

large intestine

small intestine

rectum/anus

•After digestion is complete, nutrients are absorbed and transported to all cells.

•Undigested materials are eliminated as liquid and solid wastes (urine/feces)

32.2 Digestive System

Digestion begins in the mouth and continues in the stomach.

• Mechanical (teeth) and chemical (saliva) digestion break down food.

• Peristalsis moves food through the organs.esophagus

muscles contract

muscles relax

food

stomach

32.2 Digestive System

• Digestion of carbohydrates begins in the mouth.

• Digestion of proteins occurs in the stomach. • Digestion of fats and sugars occur in the

small intestine.

32.2 Digestive System

• Most digestion takes place in the small intestines. • The pancreas, liver, and gallbladder aid in digestion.

– pancreas helps digest fat and protein – bile from the liver/gallbladder helps digest fats

liver

bile

bile

gallbladder

duodenum

pancreas

enzymes

chyme

stomach

32.2 Digestive System

Sponge # 9

1. What is the main function of the digestive system?

2. Describe how the mouth uses both mechanical and chemical digestion.

3. What three organs aide the small intestine with digestion?

4. If you ate a meal of spaghetti and meatballs, where would digestion of the pasta begin? The meat?

32.2 Digestive System

• What is the main function of the digestive system?• To break down food into smaller molecules for the body

to absorb and use for energy.

• Describe how the mouth uses both mechanical and chemical digestion.

• Mechanical: teeth chew food• Chemical: enzymes in saliva break down starches• What three organs aide the small intestine with

digestion?• Gallbladder, liver, and pancreas• If you ate a meal of spaghetti and meatballs, where would

digestion of the pasta begin? The meat?• Spaghetti: in mouth- starches• Meatballs: in stomach- proteins

32.2 Digestive System

Circulatory and Digestive System Posters• Title on top

• Describe the FUNCTION (job) of your organ

• Draw a picture

• Answer all questions on prompt

• Color• Use Big font