“Although a typical, adult human heart is only about the size of a closed fist and weighs less than a pound, this main organ in your cardiovascular system is quite complex—and relies on the proper functioning of muscle and other tissues, chambers, valves, and an electrical conduction system to keep you healthy and strong.

The various components of your heart work together to move blood through your body, send oxygen to your cells, and remove waste like carbon dioxide. When one of these parts is misfiring, valves inappropriately functioning, heart muscle tissue swelling and it can prompt health issues, including heart disease and high blood pressure.”

Health Central – HC (Anatomy of the Heart: Visual Guide to Anatomy and Function)