Cardiovascular System (CV)
Get Fit Today UK will look at your cardiovascular system, basic function a referance so you know what happening.
This Gets Your Heart Pumping
ARTERIES
VEINS
Get Fit Today UK
The CV system consists of the heart,lungs,arteries, veins and blood. The system works by :- Oxygen makes up about a fifth of the atmosphere. It enters your body when you breathe in air through your mouth and nose and into your lungs. The oxygen is absorbed into your bloodstream by your lungs. Your heart then pumps the oxygen-rich (oxygenated) blood through a network of blood vessels, the arteries, to tissues including organs, muscles and nerves, all around your body.
When blood reaches your tissues, it releases the oxygen, which is used by the cells to produce energy. In exchange, the cells release waste products - including carbon dioxide and water - that are, in turn, absorbed and carried away by blood.
This used, or "deoxygenated", blood then travels along veins back towards your heart. Your heart pumps this blood back to your lungs, where it picks up fresh oxygen, and starts the cycle once again.