The newly oxygen-rich blood (shown in red) returns to the heart and enters the left atrium. Blood flows through the left atrium into the left ventricle. The left ventricle pumps the oxygen-rich ...

Harvey showed that these little doors opened and shut in such a way that blood could only flow one way through the veins, from the periphery toward the heart. Hence, he concluded, blood had to return ...

Cycling, both stationary and outdoor, is a highly effective exercise for raising your heart rate and pumping more blood ...

Circulation issues can be visible if they affect the legs or feet. Symptoms may be invisible but cause internal sensations.

blood flows into the heart from a vein, goes into an atrium, then a ventricle, and out through an artery. The valves prevent the blood flowing backwards. The heart is relaxed and blood flows into ...

Tired legs and difficulty exercising may reveal serious health problems with your heart — before you even know it. According ...

Every day, your heart tirelessly pumps blood through your circulatory system ... all working together to facilitate the vital process of blood flow. Good circulation is essential for keeping ...

Careful auscultation of heart murmurs is an extremely valuable ... same valves will result in a diastolic murmur as blood flows backward through the diseased valve when ventricular pressures ...