Science Organisms & Life Processes Conceptual 12–13 yrs

Heart Structure & Double Circulation

心脏结构与双循环

Description

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

Mastery Evidence

✓ Labels a diagram of the heart showing atria, ventricles, valves, aorta, vena cava, and pulmonary vessels
✓ Traces the route of blood through the double circulatory system
✓ Explains the role of valves in preventing backflow
✓ Compares arteries, veins, and capillaries

Assessment Prompt

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?