The Breathing System

Question 1

Rib cage

Answer 1

Protects the lungs

Question 2

Heart

Answer 2

The heart pumps blood around your body, delivering oxygen to the tissues and removing carbon dioxide.

Question 3

Lungs

Answer 3

Air goes in and out of them and the lungs exchange gasses.

Question 4

Trachea

Answer 4

(The windpipe.) The air goes through the mouth and nose, through the trachea and to the two bronchi

Question 5

Intercostal muscles

Answer 5

They allow the ribcage to change in volume so ventilation can happen.

Question 6

Bronchus

Answer 6

This is the tube leading from the trachea to a lung

Question 7

Alveoli

Answer 7

They are small air sacs at the end of the bronchioles, where gas exchange happens.

Question 8

Bronchiole

Answer 8

They are small tubes inside the lungs leading from the bronchus to the alveoli.

Question 9

Diaphragm

Answer 9

This works with the intercostal muscles to allow ventilation to happen.

Question 10

Pleural membranes

Answer 10

These allow the lungs to move easily during ventilation.

Question 11

Inhalation

Answer 11

The intercostal muscles contract, expanding the ribcage.
the diaphragm contracts, pulling downwards to increase the volume of the chest.
pressure inside the chest is lowered and air is sucked into the lungs.

Question 12

Exhalation

Answer 12

The intercostal muscles relax, the ribcage drops inwards and downwards
the diaphragm relaxes, moving back upwards, decreasing the volume of the chest.
pressure inside the chest increases and air is forced out.