the lungs

Question 1

process of air going into lungs

Answer 1

trachea -> bronchi -> bronchioles -> alveoli

Question 2

adaptation of the trachea

Answer 2

has rings of cartilage which prevent collapsing during inhalation

Question 3

advantages of the alveoli

Answer 3

• huge surface area
• very thin walls (short diffusion distance)
• good blood supply

Question 4

how does breathing increase the rate of diffusion?

Answer 4

brings fresh O2 into the lungs and takes away CO2 making the concentration gradient larger