Respiratory System Name _____________________________ Period _____ Date _________Row#_____ 1. Where in the lungs does gas exchange take place? _____________________ pulmonary artery _____________________ 2. What diffuses from red blood cells into the alveoli? _____________________ _____________________ 3. What diffuses from the alveoli into the bloodstream? _____________________ pulmonary vein _____________________ 4. What muscle is responsible for the mechanics of breathing? _____________________ _____________________ Label the parts of the respiratory system. 1. _______________________________________ 2. _______________________________________ 3. _______________________________________ 4. _______________________________________ 5. _______________________________________ 6. _______________________________________ 5. Describe how breathing is controlled. _______________________________________ ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ ___________________________________________________________________ Circle the letter of the choice that best completes the statement or answers the question. 6. Which is the correct sequence for the path of oxygen through the respiratory system? a. nasal passages, bronchi, trachea, bronchioles, cells, blood, alveoli b. cells, blood, alveoli, bronchioles, bronchi, trachea, nasal passages c. nasal passages, blood, alveoli, bronchi, cells, trachea, bronchioles d. nasal passages, trachea, bronchi, bronchioles, alveoli, blood, cells 7. When you swallow, your epiglottis momentarily covers the top of the trachea so that a. you can swallow more easily. b. you can breathe more easily. c. you don’t get food in your air passages. d. you can cough up foreign matter.
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