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Cardiovascular System Cardiovascular System • Consists of the Heart and three different types of blood vessels. • Arteries • Capillaries • Veins http://www.thewellingtoncardiacservices.com/the-heart-cardiovascular-system.asp The Heart Pumps blood through out the body • • • • • • It’s an organ Made of cardiac muscle Size of your fist Has a right and left side Has 4 chambers Upper chambers are called Atriums • Lower chambers Ventricles • Flap like valves separate chambers and don’t allow blood to move backward http://www.skepticmoney.com/wp-content/uploads/2012/02/1-humanheart.jpg 3D Animation of the Heart • 3D Animation of the heart • http://www.youtube.com/watch?v=NF68qhyf coM http://www.smartdraw.com/examples/view/blood+flow+through+the+ heart+of+the+cardiovascular+system/ The Flow of Blood Thought the Body Blood Vessels Blood Vessels • Blood travels through your body in hollow tubes called blood vessels. • 3 types • Artery • Capillaries • Veins Arteries • Carry blood away from the heart. • Arteries have a thick wall . • Each heart beat pumps blood into your arteries at high pressure. • This is your blood pressure. • Oxygen rich blood Capillaries • Is a tiny blood vessel that allows Oxygen to enter body cells and Carbon Dioxide to leave cells. • Exchange is crucial for cells life Veins • After leaving the capillaries blood enters the veins and is brought back to heart. • Oxygen poor blood Review • How does the human heart work? • http://www.youtube.com/watch?v=H04d3rJC LCE