How does blood reach literally every cell in the body? There can’t be capillaries between every single cell when capillaries are also made of cells…. can there?

Question

How does this work?

In: 4868

Answer 1

Capillaries actually go EVERYWHERE. Diffusion definitely plays a role, but most cells will be in contact with some derivative of the circulatory system. For example, when people get thrombotic illnesses, you see the manifestation in multiple organs and even on the skin where you might not appreciate there being viable capillaries.