4.4

Question 1

Digestion

Answer 1

Breakdown of food. It includes mechanical or chemical digestion

Question 2

Mechanical digestion

Answer 2

Digestion that uses physical factors such as chewing with the teeth

Question 3

Chemical digestion

Answer 3

The chemical reaction chancing food into simpler substances.

Question 4

Alimentary canal

Answer 4

Passage from the mouth to the anus.

Question 5

Enzymes

Answer 5

Special chemicals that speed up reactions but are not themselves used up in the reaction

Question 6

Saliva

Answer 6

A watery substance in the mouth that moistens food before chewing

Question 7

Salivary glands

Answer 7

Glands in the mouth that produce saliva

Question 8

Bolus

Answer 8

Round chewed up ball that makes swallowing easier

Question 9

Oesophagus

Answer 9

Tube connecting the mouth with the stomach

Question 10

Peristalsis

Answer 10

The process of pushing food along the oesophagus or small intestine by the action of muscles

Question 11

Stomach

Answer 11

A large muscular organ that churns and mixes food with gastric juice to start to break down protein.

Question 12

Small intestine

Answer 12

Much of the digestion of food and absorption of nutrients takes place