1. The Circulatory System

2. FUNCTION: Delivery system that moves oxygen and nutrients to the body's cells, and carries away carbon dioxide and waste materials.

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4. Parts of the Circulatory System Divided into 3 major parts: – Heart – Blood – Blood Vessels

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6. Blood Vessels Hollow tubes that circulate your blood Arteries Veins Capillaries

7. http://hes.ucf.k12.pa.us/gclaypo/circdia.html Carry blood away from the heart Have strong, muscular walls The inner layer is very smooth so that the blood can flow easily Arteries

8. Veins Carry blood to the heart Transport waste-rich/ oxygen-poor blood back to the lungs and heart Valves inside the veins make blood move in one direction http://hes.ucf.k12.pa.us/gclaypo/circdia.html

9. Capillaries Only one cell thick Connect arteries & veins Food and oxygen released to the body cells Carbon dioxide and other waste products returned to the bloodstream http://sln.fi.edu/biosci/system s/circulation.html

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11. The Heart Size of your fist Thick muscular walls 4 chambers –L/R Atrium, L/R Ventricle

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13. Close up of heart valve Heart sounds are made by the valves as they open and close http://hes.ucf.k12.pa.us/gclaypo/circdia.html

14. Blood Carries nutrients, water, oxygen and waste products to and from your body cells. White blood cells protect the body from germs http://hes.ucf.k12.pa.us/gclaypo/circdia.html