Question

Capillary walls are only one layer of cells thick. Passage of oxygen into and out of the capillaries is controlled most by which process? A. collection of waste material
B. breakdown of materials
C. diffusion of material
D. storage of materials

Answer 1

Answer:

A. collection of waste material or diffusion of material

Explanation:The walls consist of a very thin layer of epithelial tissue encased in a moist membrane which enables the diffusion of nutrients and oxygen out of the blood and the diffusion of waste products into the blood