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

An ELI5: you know how in movies set in old times when there’s a fire and people form a line to pass buckets? Cells pretty much do that.

Imagine a bunch of people stood in line, and they were thirsty. The person near the well takes a glass and drinks, then they fill up a glass and passes it to the person next to them and they drink, and so on until the last person in line has had their glass of water.

Other people have gone in better detail, but the bottom line is cells help each other!