The Circulatory and Respiratory Systems
Explore the human circulatory and respiratory systems with this Grade 6 science worksheet. Learn about the functions of the heart, lungs, blood vessels, and how these systems work together to keep us healthy.
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The Circulatory and Respiratory Systems
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Read each question carefully and answer to the best of your ability. Use the provided diagrams to help you.
1. What is the main function of the circulatory system?
To break down food
To transport blood, oxygen, and nutrients
To help us see
To control our muscles
2. Which organ is responsible for pumping blood throughout the body?
Lungs
Brain
Heart
Stomach
3. The respiratory system is responsible for taking in and releasing carbon dioxide.
4. Blood vessels that carry blood away from the heart are called .
5. Label the parts of the heart shown in the diagram.
6. Label the parts of the lungs shown in the diagram.
7. Arteries carry oxygen-rich blood away from the heart.
True
False
8. The diaphragm is a muscle that helps with breathing.
True
False
Match each term on the left with its correct definition on the right.
9. Trachea
a. Tiny air sacs in the lungs
10. Alveoli
b. Windpipe
11. Capillaries
c. Smallest blood vessels
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