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Circulatory System

1) How does the decrease in vital capacity potentially influence an individual's athletic performance or aerobic condition as aging occurs?

2) What is the functional nature of a "portal system" and how does it differ from normal venous return flow?

3) Why might a clot in the lungs (a pulmonary embolism) occur after a deep vein thrombosis in the leg?

4) Name the section of descending aorta inferior to the diaphragm?

Solution Preview

1) The vital capacity is the maximal amount of air that can be exhaled by the person after a maximal inhalation. It basically is a measure of how much air we can push out of our lungs using all of our strength. A decrease in this capacity means that a decrease in the capacity to exchange air. Since vital capacity relies on a number of factors, such as the elasticity of the tissues and the ability of musculature to help inhale and exhale, a decrease in VC is often viewed as a general ...

Solution Summary

The following posting discusses aspects of the circulatory system. Concepts discussed include athletic performance, portal systems, thrombosis and sections of the system.