Grade 8 Circulatory System Worksheet
A worksheet for 8th-grade science students covering the human circulatory system, its components, functions, and common terms.
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Grade 8 Circulatory System Worksheet
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Read each question carefully and answer to the best of your ability. Refer to the diagram of the human circulatory system when necessary.
The Human Circulatory System
1. Which of the following is NOT a main component of the circulatory system?
Heart
Lungs
Blood vessels
Blood
2. What is the primary function of red blood cells?
Fighting infections
Clotting blood
Transporting oxygen
Pumping blood
3. The human heart has chambers.
4. carry oxygen-rich blood away from the heart.
5. The smallest blood vessels, where nutrient and waste exchange occurs, are called .
6. Arteries carry deoxygenated blood back to the heart.
True
False
7. The pulmonary artery is the only artery that carries deoxygenated blood.
True
False
8. Describe the path of blood through the heart, starting from the right atrium.
9. Explain the difference between systemic circulation and pulmonary circulation.
Use the words below to complete the sentences.
10. The liquid component of blood, which is mostly water, is called .
11. The lower chambers of the heart that pump blood out are the .
12. are responsible for blood clotting.
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