The Circulatory and Respiratory Systems
A worksheet for Grade 8 Science students covering the functions and components of the human circulatory and respiratory systems.
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Topics
The Circulatory and Respiratory Systems
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Date:
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Read each question carefully and provide your best answer. Some questions may require you to refer to diagrams.
1. What is the primary function of the circulatory system?
To digest food
To transport oxygen and nutrients
To produce hormones
To control body temperature
2. Which of the following is NOT a component of the circulatory system?
Heart
Blood vessels
Lungs
Blood
3. The system is responsible for taking in oxygen and expelling carbon dioxide.
4. The main organ of the circulatory system is the .
5. Air enters the respiratory system through the nose or mouth and travels down the to the lungs.
6. Briefly explain the path of oxygen from the atmosphere to the bloodstream.
7. Arteries carry deoxygenated blood away from the heart.
True
False
8. The diaphragm contracts during inhalation.
True
False
9. Label the main parts of the human heart shown in the diagram below.
A:
B:
C:
D:
10. Label the main parts of the human lungs shown in the diagram below.
E:
F:
G:
H:
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