Digestion

Question 1

Where does digestion occur?

Answer 1

• Small intestine.
• Large intestine.
• Throat.

Question 2

What is mechanical digestion?

Answer 2

Mechanical digestion is where food is broken by your teeth. This is called mechanical breakdown. The small food parts are mixed with saliva and swallowed.

Question 3

What happens to food in the stomach?

Answer 3

Two things happen:
      -> The chemical breakdown of food            
             begins.
      -> Microbes (tiny bad micro -
            Organisms) are destroyed.

Question 4

What happens to food in the small and large intestines?

Answer 4

Small intestine:
The small digested molecules are absorbed into the bloodstream.

Large intestine:
All that is left of the food is water and waste material.

Question 5

What is digestion?

Answer 5

Digestion is the process of breaking large food molecules into smaller ones.
The large starting chemicals are insoluble, so they cannot dissolve in water.

Question 6

What happens to food in the rectum?

Answer 6

Faeces are stored here until they pass out of the body.

Question 7

What happens to food in the mouth?

Answer 7

Food is chewed here and mixed with saliva.

Question 8

What are enzymes?

Answer 8

Enzymes speed up chemical reactions in the body.
Carbohydrase-> breaks carbohydrates into smaller sugars.
Protease-> breaks protein into amino acids.
Lipase-> breaks fat into fatty acids and glycerol.