By continuing to use this site, you are agreeing to the new Privacy Policy and Terms of Service. 1  Business. 2  Markets. 3  Tech. 4  Media. 5  Personal Finance. 6  Small Biz. 7  Luxury.
The heart is the central organ of the circulatory system, and pumps blood into the blood vessels which carry it to all the body parts. All these events occur with each heartbeat. The average heart rate in a normal person is 72 beats per minute, so one can imagine the speed at which blood flows through the body.
1. Circulatory System. The main function of the circulatory system is to transport nutrients and gasses to cells and tissues throughout body. This is accomplished by the circulation of blood. Two components of this system are the cardiovascular and lymphatic systems.