Circulatory System

Blood
The blood is used to carry oxygen to the systems of the body. It is used as a delivery system after it receives oxygen from the lungs.

Heart
The heart is used to pump blood through the body, and is used as a pressurized system to push blood through the body.

Veins
Veins are used as passages through the body, and carries the blood around.

1. What 2 things does blood carry?

2. What are the 4 parts of the heart?