Answer:
There's only so much blood to go around, so homeostasis makes sure that blood is where it needs to be at the right time. Think about how exercising starts off slow, but ramps up after a minute or two. That's because the cardiovascular system gets wind of the extra effort and then re-routes blood to the muscles, lungs and heart. However, after a big meal the digestive system needs a little TLC, so more blood is sent there to balance things out. Whenever tissues need more blood to get the job done, homeostasis provides the supply, keeping the bodily scale balanced and in harmony.
