In high school, you probably learned that trigonometric functions – like sine, cosine and tangent –can be derived, geometrically, from a circle (hence why trig functions are also known as “circular” ...

Our heart and lungs circulate oxygen throughout our blood vessels to keep cells alive. At the center of the circulatory system is the heart, which works with the lungs to constantly keep the body ...

Your heart is a muscular organ about the size of a fist located in the chest cavity close to the lungs. It functions as a pump, consistently circulating blood throughout the body. The heart also helps ...

Contrary to the widely accepted explanation that the human heart is simply a pump, Mayo Clinic researchers have uncovered novel findings on how cardiac muscle operates. The findings will appear in the ...