Question

Describe how capillaries are adapted for their function.

Accepted Answer

Adaptations of capillaries:Large surface area for diffusion of substances in/out of bloodWalls are single endothelial cell thick - thin layer for diffusion - small diff distanceTotal cross sectional area of capillaries greater than arteriole so blood flow rate falls - blood moves more slowly giving more time for exchange of substances by diffusion

Front	Describe how capillaries are adapted for their function.
Back	Adaptations of capillaries: Large surface area for diffusion of substances in/out of blood Walls are single endothelial cell thick - thin layer for diffusion - small diff distance Total cross sectional area of capillaries greater than arteriole so blood flow rate falls - blood moves more slowly giving more time for exchange of substances by diffusion

Diffusion Blood Capillaries Area Substances Describe Adapted Function