Mammalian gas exchange system

Question 1

The lungs

Answer 1

Trachea
Bronchi
Bronchioles
Alveoli

Question 2

Gas exchange in alveoli

Answer 2

-> Oxygen diffuses from alveoli to blood capillaries
-> Carbon dioxide diffuses from blood into aveoli
-> alveoli = large SA, thin walls, good blood supply

Question 3

Inhilation

Answer 3

diaphragm contracts and moves down, the ribcage moves up and out, and the volume of the chest cavity increases.

Question 4

Exhalation

Answer 4

diaphragm relaxes and moves up, the ribcage moves down and in, and the volume of the chest cavity decreases