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 ...

The aorta, a large blood vessel responsible for transporting oxygenated blood from the heart to the rest of the body, plays a ...

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 ...

The human heart is a vital organ that pumps blood through the body. You probably don't even think about it, but your heart is always working — it beats about 100,000 times a day, which adds up ...

When you’re living with type 2 diabetes, poor circulation can be a genuine concern. Here's how to improve your blood ...

Hence, he concluded, blood had to return to the heart. What clinched the discovery, in addition to Harvey’s recognition of the valves’ importance in maintaining circulation, was his unprecedented ...

Originally appeared on the NOVA Web site Cut to the Heart. Let's get straight to the heart of the matter—the heart's job is to move blood. Day and night, the muscles of your heart contract and ...

Circulation is the movement of blood through the cardiovascular system, resulting in the distribution of nutrients, oxygen and other products of metabolism throughout the body.

Discover animals with more than one heart, from the three-hearted octopus to multi-hearted worms—evolution’s answer to unique ...

Men’s leggings have become an essential part of modern fitness apparel, providing both comfort and performance benefits.