Respiration/Circulatory Systems Lab

Respiratory and Circulatory Systems Lab Name:

How do the Respiratory and Circulatory systems work together? ______.

Data Tables:

Heart rate/pulse Time to Turn Phenol Red Table 1 (beats/minute) yellow (seconds)

Resting Rate

Rate after Exercise

Trial 1 Trial 2 Trial 3 Average Average Tidal Table 2 Diameter Diameter Diameter Diameter Radius Volume (cm) (cm) (cm) (cm) (cm) (ml) Tidal Volume

Trial 1 Trial 2 Trial 3 Average Average Vital Total Table 3 Diameter Diameter Diameter Diameter Radius Capacity Capacity (cm) (cm) (cm) (cm) (cm) (mL) (mL) Lung Capacit y

Analysis and Conclusion Questions: 1. What happened to your heart rate during exercise? increase/decrease (circle one). Explain why in terms of oxygen demand and carbon dioxide production. 2. The color of the Phenol Red solution change faster/slower (circle one) after exercise. Explain what does this indicate about the concentration of carbon dioxide produced?

3. How does your tidal volume and vital capacity compare with those of your other classmates? Why might there be some variation in the measurements other than “error in measuring”?

4. Even though you may exhale as completely as you can, some air still remains in your lungs. Why do you think this is important?

5. How might vital capacity be important to some musicians?

6. How do you think smoking would affect your vital capacity?

7. How do the circulatory and respiratory systems work together in response to increased activity?

8. As you inhale your diaphragm contracts increasing/decreasing (circle one) the volume of your chest cavity. This also increases/decreases (circle one) the pressure inside you chest cavity causing air to rush in/out (circle one) of your lungs. In your lungs, oxygen is absorbed and carbon dioxide is released. As you exhale the carbon dioxide, your diaphragm relaxes increasing/decreasing (circle one) the volume of you chest cavity. This also causes a corresponding increase/decrease (circle one) in pressure inside the chest cavity forcing the carbon dioxide to rush in/out (circle one) of your lungs.