Y8 Breathing System

Question 1

What is the first part of the breathing system?

Answer 1

Air enters your body through your mouth and your nose.

Question 2

How much nitrogen is in inhaled air (%)?

Answer 2

78%

Question 3

How much Oxygen is in Inhaled air (%)?

Answer 3

21%

Question 4

How much carbon dioxide is there in inhaled air (%)?

Answer 4

0.04%

Question 5

What is the percentage of other gases in the breathing system (%)?

Answer 5

0.96

Question 6

What is the second step of the breathing system?

Answer 6

Air moves down the trachea (windpipe).

Question 7

What tissue does the trachea have to keep it open?

Answer 7

It has ring of cartilage.

Question 8

What happens before the fourth step of the breathing system?

Answer 8

Air moves down a bronchus.

Question 9

The bronchus splits into…

Answer 9

Many Bronchiole

Question 10

The bronchiole contains ….

Answer 10

many alveoli

Question 11

Alveoli is

Answer 11

Air sac

Question 12

What is the trachea?

Answer 12

It has rings of cartilage to keep it open

Question 13

What does the ribcage do?

Answer 13

The bones in it protects the lung.

Question 14

What does the heart do?

Answer 14

It pumps blood around the body as it is a muscle.

Question 15

What is the bronchiole?

Answer 15

It is a small tube for the air to travel in

Question 16

What does the alveolus do?

Answer 16

It is where the oxygen gets diffused into the blood.

Question 17

What happens to the intercostal muscles when you inhale and exhale ?

Answer 17

Inhale- they move up and out

Exhale- they move in and down

Question 18

What is the job of the alveoli?

Answer 18

For oxygen to diffuse quickly into the de-oxygenated blood.

Question 19

Why do we need many alveoli?

Answer 19

So more blood can pass around the body.

Question 20

What happens to the volume inside our chest?

Answer 20

It increses