How exactly does the body direct blood to a muscle or organ that is under heavy stress at a specific time?

Question

I was working out and I felt my chest get pumped up from benching and I wondered what mechanics allow one muscle to accept way more blood than everything else, when all the blood vessels are connected with nothing blocking blood to go anywhere in the body. How does the body just get more blood to the chest, or send more to the stomach when it’s breaking down a big meal?

In: 5

Answer 1

More like: your circulatory system starts pumping more oxygen rich blood generally. And the area needing that resource opens up (dilates) it’s blood vessels to accept more of it.