Name
Date
Section
Respiratory System Worksheet
Part A. Label the diagram below.
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Part B. Label the diagram below.
Part C. Put a check mark before each statement if it occurs during inhalation.
1. The lungs expand.
2. The thoracic cavity expands.
3. Intercostal muscles relax.
4. The diaphragm relaxes.
5. The diaphragm contracts.
6. The volume of the lungs decreases.
7. The pressure inside the lungs increases.
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Part D. Answer all questions in COMPLETE SENTENCES.
1. Identify the end of every bronchiole. Explain why it is efficient at performing its
function.
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2. Describe the relationship between cigarette consumption and the risk of getting
lung cancer using the figure below.
http://www.abpischools.org.uk/res/coResourceImport/modules/breathingandasthma/en-images/8.4.png
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3. Explain why inhalation is an active process and exhalation is a passive process.
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4. Explain why people who smoke often may have trouble breathing.
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5. Explain one way that the respiratory system is important to the circulatory
system. (What’s one reason your circulatory system wouldn’t work without your
respiratory system?)
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