Lungs

Question 1

passage of air

Answer 1

trachea, bronchi , bronchioles, alveoli the capillary

Question 2

alveoli function and adaptions

Answer 2

where the lungs and the blood exchange oxygen and carbon dioxide during the process of breathing in and breathing out. Oxygen breathed in from the air passes through the alveoli and into the blood and travels to the tissues throughout the body.

(millions of alveoli)Large surface area to allow faster diffusion of gases across the surface
Thin walls( one cell thick) to ensure diffusion distances remain short

Good ventilation with air so that diffusion gradients can be maintained

Good blood supply (dense capillary network) to maintain a high concentration gradient so diffusion occurs faster