Maybe, I don't know, keeping you alive is one thing. Yeah, that seems to be a contribution. Another would be giving your lungs something to do. And pumping energy to your legs and the rest of your body in the form of oxygen carried by red blood cells. Assuming your cells are in an isotonic environment. Which most of the time they are. Unless you drank waaaay too much water or saltwater. Which most people tend to avoid doing. Oh, and it also makes your brain work. Just adding that as a short note.
To pump oxygenated blood to the vital organs within the human body.
its the heart
it pumps blood around the body. if the human heart stops it means your dead
Blood is pumped by the heart.
by the cells
The human heart is in the chest cavity.
The importance of vegetables in our diet is to help provide the human body with vitamins. The human body needs vitamins in order to function properly.
energy
i wish i knew
To allow humans to live.
by the cells
Valves in the heart help to keep the blood flowing in the right direction.
Without cells a human body can't function.