🫀 Part 1: Heart Structure Knowledge

1. Which chamber of the heart receives oxygen-poor blood from the body?

Right atrium

Left atrium

Right ventricle

Left ventricle

2. What is the main function of heart valves?

To pump blood faster

To prevent blood from flowing backward

To add oxygen to blood

To filter blood

3. Fill in the blanks: The ____________ carries oxygen-rich blood away from the heart to the body, while the ____________ brings oxygen-poor blood back to the heart.

4. Check all parts that are chambers of the heart:

Right atrium

Aorta

Left ventricle

Pulmonary artery

Right ventricle

Left atrium

🔄 Part 2: Blood Flow and Function

5. Number the steps of blood circulation in the correct order (1-4):

_____ Oxygen-rich blood returns to the left atrium from the lungs

_____ Right ventricle pumps blood to the lungs through pulmonary artery

_____ Left ventricle pumps oxygen-rich blood to the body through the aorta

_____ Oxygen-poor blood enters the right atrium from the body

6. Explain what happens during systole and diastole:

7. Why does the left ventricle have thicker walls than the right ventricle?

🧠 Part 3: Critical Thinking

8. What might happen if the mitral valve (between left atrium and left ventricle) didn't close properly? Explain your reasoning.

9. How does the heart work as a system with the lungs? Describe their relationship.

10. Draw and label a simple diagram showing the path blood takes from the heart to the lungs and back:

Human Heart Structure Function

Human Heart Structure Function

🫀 Part 1: Heart Structure Knowledge

🔄 Part 2: Blood Flow and Function

🧠 Part 3: Critical Thinking

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