1. Blood pumps from the right ventricle to the lungs and the left ventricle to the aorta where small arteries branch. The coronary arteries carry blood to the heart. Other branches distribute blood throughout your body to places like the brain, intestines and other organisms.

   
   

2. It regulates the blood flow. It makes sure the blood goes to all the places it needs to go. The arteries act like control gates.

Materials are exchanged between the blood and body's cells.

The materials such as glucose and oxygen, come from the arteries. The materials are passed by blood into the cells. One way the materials are exchanged is called diffusion where molecules move from high to low concentration.

After the blood moves through the capillaries it enters larger vessels called the veins which carry blood back to the heart.

By the time the blood gets to the veins the hearts pushing force has less effect than it does in the arteries. Though several other things help the blood to flow.

1. Since they are located near the skeletal muscles, when you contact your muscles it pushes the blood.

2. Larger veins have valves to prevent blood from flowing backwards and to help them go forward

3. Breathing movement which pushes a squeezing pressure against the veins in your chest which forces the blood to move towards the heart.