The Blood Circulatory System
The Blood Circulatory System The Circulatory system is a system in the bodies of all organisms that moves the nutrients that are needed as well as gases and wastes to and from cells and helps fight unwanted bacteria and other diseases. It also helps alleviate the body temperature to maintain homeostasis, which is the property of either an open system or a closed system in a living organism. It brings the body’s cells what they need in order to survive – oxygen and nutrients. The center of the circulatory system, also known as the cardiovascular system, is the heart. The heart is one of the main components in this system. The heart pumps oxygenated blood and the tubes, also known as blood vessels, carries the oxygenated blood to every cell in the body and is then returned to the heart as deoxygenated blood. The main components of the human circulatory system are the heart, the blood, the blood vessels, and the platelets. The heart’s job is to pump blood and keep the blood moving throughout your entire body. There’s a thick layer of muscle called myocardium that contract and squeeze out blood. In the heart, there is the atrium – the part that receives the blood – and the ventricle, which pumps blood out of the heart. There are four chambers in total: left atrium, left ventricle, right atrium, and right ventricle. The left-hand side of the heart pumps blood from the lungs to the rest of your body. This is known as the systemic circulation. The right-hand side pumps blood from the heart to the lungs and this is known as the pulmonary circulation. Blood is the fluid that constantly flows throughout our bodies. The blood carries nutrients, water, oxygen, and waste products to and from the body cells. There are two types of blood cells: the red blood cell which is responsible for transporting oxygen and carbon dioxide and the white blood cell which helps the body fight off and attack germs, foreign substances, and unwanted bacteria.
The heart pumps blood through
Cited: Fox, Stuart Ira. Human Physiology. sixth. New York: McGraw-Hill, 1999.
George , Claypoole. "Hillendale Heart." Hillendale . 22 Mar 2008 <http://hes.ucfsd.org/gclaypo/circulatorysys.html>.
Weeg, Patti . "The Circulatory System." The Global Classroom. 22 Mar 2008 <http://www.globalclassroom.org/hemo.html>.