Chapter 11 Cardiovascular system  Â
1. Case Scenario An athlete on completeion of 400 mts relayrun experiences a very rapid heart beat and then after sometimesexperiences normal heat beat.
a.Which system is responsible for increaing the heartrate?
b.Which system is responsible for decreasing is heartrate?
2. Describe how the valves keep the blood moving in onedirection? Â Â
3. Why is the pressure in the pulmonary circulation lower thanin the systemic circulation? Â Â
4. Watch this video to explore capillaries and how theyfunction in the body. Capillaries are never more than 100micrometers away.
a. Describe the structure of the capillary walls.
b. What is the main component of interstitial fluid?
c. What is microcirculation? Name the two types of capillaryvessels and name the actual exchange vessels
