Cardiovascular System Guide: Heart Health & Exercise Effects

What are the four parts of the cardiovascular system? Understand how exercise, smoking, and serotonin influence heart health and normal cholesterol ranges.

Portrait of a young woman in sports clothing jogging on walkway

What Happens to the Cardiovascular System During Exercise?

For centuries, the way blood circulated seemed more magic than science, until 1628 when William Harvey described the mechanics by which it flowed against the force of gravity, in his work "De Motu Cordis." Your cardiovascular system pumps and delivers crucial oxygen and nutrients to your entire body.

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