Digestive System

Question 1

Describe the digestive system

Answer 1

Breaks down the food you eat into nutrients such as carbohydrates, fats and proteins.

Question 2

Compare mechanical and chemical digestion

Answer 2

• Mechanical digestion physically breaks down foods into smaller pieces. Mechanical digestion begins in the mouth.
• Chemical digestion breaks down foods simpler nutrients that can be used by the cells. Chemical digestion begins in the mouth when to food is mixed with the saliva.

Question 3

The kidneys are the main organ of excretion. What other organs of the body are also involved?

Answer 3

Other organs of the body including the liver, skin, large intestines and lungs. Together all of these organs make up the excretory system. They don’t work the same way organs do in most other body systems.

Question 4

Describe peristalsis

Answer 4

Is a series of wave-like muscle contractions that moves food to different processing stations in the digestive tract.