Body Systems Vocabulary

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📚 Part 1: Vocabulary Matching

Instructions: Match each term with its correct definition by writing the letter in the circle.

1. Heart

2. Arteries

3. Veins

4. Alveoli

5. Capillaries

Definitions:

A. Blood vessels carrying blood to the heart

B. Tiny blood vessels connecting arteries and veins

C. Small air sacs in lungs for gas exchange

D. Muscular organ pumping blood through the body

E. Blood vessels carrying blood away from the heart

Instructions: Complete each sentence using the vocabulary words from the word bank.

Word Bank: oxygen, carbon dioxide, respiratory, circulatory, lungs, exhale

6. The ______________ system transports blood and nutrients throughout the body.

7. The ______________ system is responsible for breathing and gas exchange.

8. ______________ are the organs where gas exchange occurs between air and blood.

9. ______________ is the gas needed for cellular respiration.

10. We ______________ to remove carbon dioxide from our bodies.

11. How do the circulatory and respiratory systems work together? Explain in 2-3 sentences.

12. What happens to your breathing and heart rate when you exercise? Why?