Chapter 7- The Breathing System

Question 1

Breathing out

Answer 1

Exhaling

Question 2

What happens during breathing?

Answer 2

1) We breathe oxygen into our lungs.
2) The oxygen then passes from our lungs into the bloodstream.
3) The blood carries the oxygen to the cells where it is used in respiration.
4) Carbon dioxide and water are waste products of respiration.
5) They pass from the cells into the bloodstream and are carried back to the lungs.

Question 3

Larynx

Answer 3

Responsible for making sounds.

Question 4

Rings of cartilage

Answer 4

Keeps the air tubes open.

Question 5

Lungs

Answer 5

The breathing organ

Question 6

Intercostal muscles

Answer 6

Cause the rib cage to move up and down during breathing.

Question 7

Diaphragm

Answer 7

A sheet of muscle which moves up and down during breathing causing air to move in and out of the lungs.

Question 8

Trachea

Answer 8

Allows air to move in and out of our lungs.

Question 9

Bronchus

Answer 9

Tube which carries air from the trachea to the lungs.

Question 10

Bronchioles

Answer 10

Thin tubes which carry air within the lungs.

Question 11

Alveoli

Answer 11

Tiny air sacs covered by a network of narrow blood cells. Oxygen and carbon dioxide are exchanged in the alveoli.

Question 12

When does gaseous exchange occur?

Answer 12

Occurs when oxygen from the air is swapped with carbon dioxide from the body.

Question 13

Dangers of smoking

Answer 13

• Tar
• Harmful chemicals
• Carbon monoxide
• Dangerous during pregnancy
• Causes lung cancer

Question 14

Breathing in

Answer 14

Inhaling