To do: Your heart is a muscle about the size of your fist. It is constantly beating, on average about 1 beat every second. To do: Open and close your fist, once every second. Do you get tired quickly?

Objectives What are the four parts of the heart called? Grade D Why does the heart need valves in it? Where does each side of the heart pump blood? Why is the left side of the heart thicker than the right side? Grade C Why does the heart need it’s own blood supply if it is full of blood all day? Grade B What would happen if that blood supply was blocked by fat and blood clots? Grade A

Right side Left side

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Circulation

Include this information in your story What are the four parts of the heart called? Grade D Why does the heart need valves in it? Where does each side of the heart pump blood? Why is the left side of the heart thicker than the right side? Grade C Why does the heart need it’s own blood supply if it is full of blood all day? Grade B What would happen if that blood supply was blocked by fat and blood clots? Grade A

Your task You are a red blood cell. Your job is to carry oxygen and carbon dioxide around the body. It’s like being a taxi driver. Tell your story: Your task When do you pick up oxygen? When does the blood pick up carbon dioxide? What can you see on your journey?

Lungs: pick up oxygen Heart pumps deoxygenated blood to lungs Oxygenated blood taken to heart Blood takes carbon dioxide to heart Oxygenated blood pumped around body Blood picks up carbon dioxide from body cells Blood cells give oxygen to body cell