| The Circulatory System |
| |
|
|
|
| |
|
| |
|
| |
|
| |
| |
| The blood is the transport system by which oxygen and nutrients
reach the body's cells, and waste materials are carried away. The heart, a
muscular organ, positioned behind the ribcage and between the lungs, is the
pump that keeps this transport system moving. |
| |
| |
| |
|
| Blood that is rich in oxygen appears red. |
| |
|
| Blood that is poor in oxygen appears blue. |
|
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
| |
| |
| |
| |
| |
| |
| |
| Blood leaves the left side of the heart and travels through arteries, which gradually divide into
capillaries. In the capillaries, food and oxygen are released to the body
cells, and carbon dioxide and other waste products are returned to the
bloodstream. 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. |
|
|
| |
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| To
see some amazing facts about the Circulatory System |
|
|
|
| |
|
|
|
| |
| |
| |
| |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|