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 that helps circulate your blood, which delivers oxygen and nutrients to your tissues. There are four chambers and four valves in your heart, and each ensures proper ...

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

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 ...

The vagus nerve is one of 12 pairs of cranial nerves in the body. It’s involved in various bodily functions, including digestion, heart rate, and breathing. There are 12 cranial nerves in the body.