The Human Heart : A General Description Essay

1007 Words Dec 5th, 2015 5 Pages
The Human Heart: A General Description The heart is the main organ of the cardiovascular system in the human body. Its primary function is to pump oxygen- and nutrient-rich blood throughout the 60,000 miles of blood vessels that make up this system ("Heart, 2015"). About the size of a clenched fist, the heart is located in the middle of the chest, between the lungs and nestled behind the ribcage. It lies a little to the left of the sternum. The shape of the heart is reminiscent of an upside down pear with arteries and veins branching from its upper and lower regions. On the inside, the heart is separated into four chambers. The upper two chambers are the right and left atria and the lower two chambers are the right and left ventricles. A wall of tissue called the septum separated the different chambers. The four chambers are further separated from each other by four valves that control the flow of blood into the heart. Those valves are the tricuspid valve, pulmonary valve, mitral valve, and aortic valve ("How the Healthy Heart Works, 2015"). On the outside of the heart, there are six major blood vessels that aid in the circulation process: the aorta, superior vena cava, inferior vena cava, pulmonary vein, pulmonary artery, and coronary arteries ("What Does Your Heart Look Like and How Does It Work, n.d.").

Importance of the Heart to the Body When oxygen-depleted blood from the body enters the heart, it enters through the right atrium. There it is pumped through the…

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