Capillaries allow for diffusion of oxygen into cells because

Question

Quizplus · Accepted Answer

Capillaries have thin walls that allow for diffusion of oxygen and other nutrients into cells. Blood flow through capillaries is also slowed, which allows for more time for diffusion to occur. The lower concentration of oxygen in the blood compared to inside the cells also drives diffusion. Therefore, choices A and C are both correct, and the best answer is D. Choice B is not entirely accurate because oxygen is actually more concentrated in the blood than in the tissues, but it still allows for diffusion due to concentration gradients.

Capillaries Allow for Diffusion of Oxygen into Cells Because