Gas exchange humans

Question 0

How are alveoli socialised for gas exchange

Answer 0

1. huge number of microscopic alveoli, gives the lungs a large surface area
2. Moist lining for gas to dissolve in
3. have thin walls so gas doesn’t have to diffuse far (and permeable walls)

Question 1

What problems can smoking cause

Answer 1

1. damages walls inside alveoli, reducing surface area for gas exchange-causes diseases like emphysema
2. contains chemicals (carcinogens) that lead to cancer
3. tar irritates bronchi and bronchioles- causes smokers cough and chronic bronchitis

Question 2

What alveoli even do

Answer 2

Carry out gas exchange in the body