Get to know the functions of your heart, blood vessels, and blood itself and how they work together to maintain your health.

Peripheral artery disease (PAD) and chronic venous insufficiency (CVI) both affect your blood vessels and prevent your body from getting the oxygen-rich blood that it needs. The difference between the ...

Vasoconstricting and vasodilating medications work in different ways. While vasoconstricting medications tighten your blood vessels to raise blood pressure, vasodilating medications dilate or widen ...