Your Circulatory System

1. Your Circulatory System

2. Function: Your Circulatory System is Responsible for Delivering and Removing Materials from Every Cell in Your Body Web Sources and Resources Usborne Human Body: Quicklinks

3. Blood Blood transports oxygen from the lungs to body tissue and carbon dioxide from body tissue to the lungs. • Red blood cells: carry oxygen to body cells • Hemoglobin: protein in red blood cells that carry Oxygen and carbon dioxide • White blood cells: Fight infection • Approximately 55 percent of blood is plasma, a straw-colored clear liquid. The liquid plasma carries the solid cells and • Platelets which help blood clot. Without blood platelets, you would bleed to death. .

4. Blood Types • Blood surface antigens determine blood type • Antigens stimulate an immune response (your body’s way of fighting a foreign body) • A and B refer to the blood surface antigens on the red blood cells. O means there are no blood surface antigens present. • Antibodies which react with the antigens are present in your body against other types of blood • If you are A, then you have anti-B antibodies in your blood, so you can’t receive type B blood because they contain anti-A antibodies which would react poorly with the A antigens on your blood cells.

5. Blood Types

7. Circulation Path

9. **Circulation Path** • Blood Leaves the Left side of the heart and travels through Arteries Away from your heart and gradually divide into capillaries. The blood then travels in veins back to the right side of the heart, where it is pumped directly to the lungs. In the lungs, carbon dioxide is exchanged for oxygen, and this renewed blood flows back to the left side of the heart, and the whole process begins again.

11. Blood Vessels • Arteries – carry oxygen-rich blood away from the heart to the rest of the body  arterioles  • Capillaries – tiny blood vessels – only one cell at a time – reaches the tissues • Veins – carry oxygen-poor blood from the tissues back toward the heart

12. Heart

14. Heart