Gas Exchange/ Digestion

Question 0

What are villi?

Answer 0

Small structures that increase the surface area to allow food to be absorbed more quickly

Question 1

What is peristalsis?

Answer 1

When food is pushed along the oesophagus by the action of muscles

Question 2

How does air enter the body?

Answer 2

Through the trachea

Question 3

The trachea branches into smaller tubes called ——

Answer 3

Bronchi

Question 4

The bronchi then branches into smaller tubes called

Answer 4

Bronchioles

Question 5

At the end of the bronchioles there is an … ….

Answer 5

Air sac

Question 6

The air sac has bumps on them what are these bumps called?

Answer 6

The alveoli

Question 7

What are cilia?

Answer 7

They are small hair like structures stop mucus blocking air ways by pushing it down

Question 8

What happens when you inhale?

Answer 8

Air rushes in
Intercostal muscles contract
Volume of chest cavity increases
Diaphragm contracts
Pressure decreases

Question 9

What happens when you exhale?

Answer 9

Air rushes out
Intercostal muscles and diaphragm relax
Volume of chest cavity decreases
Pressure increases

Question 10

What’s the test for carbon dioxide?

Answer 10

If present turns limewater cloudy