answersLogoWhite

0

The heart pumps blood through blood vessels. Blood vessels leaving the heart are called arteries, and the blood vessels returning to the heart are called veins. Connecting the arteries and veins are smaller blood vessels called capillaries.
It's pumped around through tubes called veins and arteries by the heart.
The circulatory system is basically a closed network of tubes. The heart muscles contract, which squeezes blood into the arteries. There are valves in arteries and veins to stop the blood flowing 'backwards' - and so, with each heartbeat, the blood is forced forwards through the circulatory system before returning to the heart to start again.

User Avatar

Wiki User

12y ago

What else can I help you with?