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

You know that blood flows through arteries to capillaries. Capillaries are semi-permeable : they will let small things like water, oxygen, CO2, nutrients through but no proteins or red blood cells (normally). This filtered fluid bathes the cells of organs, muscles, skin etc and keeps our cells hydrated and gives the gas/nutrients to the cells.