The diameter of capillaries is smaller than the diameter of the red blood cells passing through them. How does this relationship help in gaseous exchange in lungs?
- The red blood cell membrane is in close association with the capillary membrane all through its passage. This reduces the distance across which gases diffuse during gaseous exchange.
- The red blood cells squeeze through the capillary at a low rate to allow them to pick enough oxygen and give up carbon dioxide and vice versa.
- Changes in shape as the red blood cells squeeze through the capillary exposes a large surface area across which the gases are exchanged.
CATEGORIES Bio Questions and answers
TAGS Dr. Bbosa Science
