Question

UNLIUL Tespiration. d. photosynthesis.
b. bronchioles.
a. bronchi.
c. bronchus.
d. alveolus.
b. moves down.
d. moves up and down.
a. moves up.
cremains at its position.
5. Exhaled air contains
c. more nitrogen.
d. more hydrogen.
3. Inside the chest, the trachea divides into two branches called
4. In humans, during inhalation, the diaphragm
a. more carbon dioxide. b. more oxygen.​

Answer 1

1 answer is

b)

and all I don't know

but I hope first one is right

ok bye