Chapter 2: Structure

Question 1

Main organs

Answer 1

• nose
• mouth
• trachea
• bronchi
• bronchioles
• lungs
• thoracic muscles
• blood

Question 2

Nose and mouth

Answer 2

Passes through into respiratory system. Nose has tiny hairs (cilia) which traps dust and prevents it from getting into the lungs

Question 3

Trachea and bronchi

Answer 3

Air passes through trachea (windpipe) into the lungs via tubes called bronchi.

Question 4

Lungs

Answer 4

Sponge like sacs in chest cavity made of millions of alveoli which allows air to pass through and is surrounded by capillaries where gaseous exchange takes place

Question 5

Trachea

Answer 5

Air flows down and is reinforced by rings of cartilage and lined with cilia to trap particles

Question 6

Bronchi

Answer 6

One bronchus goes from trachea into each lung. Mucous id produces to trap particles and the bronchi divide in to bronchioles

Question 7

Alveoli

Answer 7

Tiny air filled sacs surrounded by capillaries. Thin wall so gases can cross between air sacs and capillaries for gaseous exchange. Many alveoli for increase surface area.