What is the functional nature of a portal system

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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?

Reference no: EM13938588

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