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The Heart and Circulatory System 1st Year Science True or False? Arteries carry blood from the heart Capillaries have very thick walls Capillaries connect arteries and veins Veins have no valves Arteries carry oxygenated blood Veins carry blood towards the heart Arteries carry deoxygenated blood Veins have a large space inside Capillaries have valves to prevent the backflow of blood What does the heart do? • The heart is a muscle that pumps blood around the body • It pumps oxygenated blood from the lungs around the body • It pumps deoxygenated blood from the body back to the lungs Now look at the heart animation! Looking at the heart….. • The right side of my heart pumps blood to my lungs • The left side of my heart pumps blood to the rest of my body • The heart contains four valves to stop the backflow of blood http://www.bbc.co.uk/scotland/education/bitesize/standard/ biology/the_body_in_action/the_need_for_energy_rev6.sht ml This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.