The chambers of the heart operate as a ‘double-pump’ system for the body’s circulation. In coordination with valves, the chambers work to keep blood flowing in the proper sequence.

Medically reviewed by Jeffrey S. Lander, MDMedically reviewed by Jeffrey S. Lander, MD The cardiovascular system, also known as the circulatory system, includes the heart and blood vessels. It plays ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The integumentary system, or skin, is the largest organ in the body. Besides the skin, it ...