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

As the central part of the circulatory system, the heart is responsible for pumping blood, supplying oxygen and nutrients, and removing metabolic waste such as carbon dioxide from all the tissues in ...

Adolescent athletes' cardiovascular system may adapt to increased cardiorespiratory fitness by increasing blood pressure, ...

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.