🔬 Science · Organisms & Life Processes
Heart Structure & Double Circulation
Describe the structure of the heart (four chambers, valves, coronary arteries) and explain how it pumps deoxygenated blood to the lungs and oxygenated blood to the body in a double circulatory system
Typical age: 12–13 years
“If your child felt their heartbeat, could they describe what the heart is doing — explaining the two sides of the heart, where the blood goes from each side, and why we need a double loop?”
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