Why Is the Circulatory System Important to Humans?
The circulatory system is the primary system that keeps the body alive. The system and its components provide energy and oxygen to bodily organs and tissues, while also removing waste. When it fails, humans die. • The Facts • The circulatory system, also known as the cardiovascular system, is made up of the heart and the blood vessels–veins and arteries–that circulate blood throughout the body. The average heart beats 100,000 times and pumps roughly 2,000 gallons of blood every day, according to the American Heart Association (AHA). The heart association estimates the average heart will beat more than 2.5 billion times in a 70-year life. The organ pumps about 5 quarts of blood every minute, according to Mayoclinc.com. The typical body has about 6 quarts of blood. • Significance • The circulatory system is an involuntary system, meaning it works on its own, without us knowing it’s happening. With each beat, or expansion and contraction, the heart pumps blood through a vast array of tu
