8.5 The structure of human breathing system - This is all anatomy Jamie.

Question 1

What is the name of the cavity where the lungs are found?

Answer 1

• Thorax

Question 2

What type of membrane lines the thorax and the outside of the lungs

Answer 2

• A pleural membrane

Question 3

Describe the pleural membrane of the lungs

Answer 3

• The pleural membrane of the lungs has an outer parietal layer and an inner visceral layer
• There is a space between these two membranes which contains fluid
• The fluid helps to reduce friction between the lungs and the chest cavity when the lungs move.

Question 4

What is the anatomical structure which seperates the thorax (Chest cavity) from the abodmen

Answer 4

Diaphragm

Question 5

What skeletal structure protects the lungs

Answer 5

Rib cage

Question 6

What is the name of the muscle found between each rib

Answer 6

Intercostal muscle

Question 7

What is the name of the tube through which air is brought to the lungs from outside of the body

Answer 7

Trachea

Question 8

what is the role of the cartilage in the trachea

Answer 8

• Ensures that the traches is kept rigid and open,
• Is flexible so the trachea can expand and lengthen during breathing

Question 9

Why is the cartilage in the trachea c shaped

Answer 9

• The oesophagus lies behind the trachea
• The c shaped cartilage means the back of the trachea is not as rigid as the front and therefore allows food to pass down the trachea

Question 10

What is the namme of the two tubes which the trachea divides into.

Answer 10

• Left and right bronchus

Question 11

What do the left and right bronchus then divide into

Answer 11

Bronchioles

Question 12

What is the name of the small sacs found at the end of bronchioles where gaseous exchange occurs

Answer 12

• ALveoli

Question 13

Why is the left lung smaller than the right lung

Answer 13

• The right lung has 3 lobes, whereas the left lung smaller, it only has 2 lobes because because it is on the same side of the thoracic cavity as the heart.