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Physicians, as well as citizens, of many cultures had their own beliefs concerning the nature of the heart and circulatory system. While the Greeks believed that the heart was the seat of the spirit, the Egyptians believed the heart was the center of the emotions and the intellect.
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www.accessexcellence.org/AE/AEC/CC/heart_background.htm...
www.accessexcellence.org/AE/AEC/CC/heart_background.html
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The heart and circulatory system are our body's lifeline, delivering blood to the body's tissues. Brush up on your ticker with this body basics article. ... About the Heart and Circulatory System...
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kidshealth.org/parent/general/body_basics/heart.html
kidshealth.org/parent/general/body_basics/heart.html
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The circulatory system works closely with other systems in our bodies. It supplies oxygen and nutrients to our bodies by working with the respiratory system. At the same time, the circulatory system helps carry waste and carbon dioxide out ...
http://kidshealth.org/teen/your_body/body_basics/heart....
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Watch this video to see how a healthy heart works. ... The conduction system keeps your heart beating in a coordinated and normal rhythm, which in turn keeps blood circulating. The continuous exchange of oxygen-rich blood with oxygen-poor blood is what keeps you alive.
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www.mayoclinic.com/health/circulatory-system/MM00636
www.mayoclinic.com/health/circulatory-system/MM00636
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Pictures of the heart, circulatory system, conduction system, arteries, and blood vessel anatomy. ... Your heart and circulatory system make up your cardiovascular system. Your heart works as a pump that pushes blood to the organs, tissues, and cells of your body. Blood delivers oxygen and nutrients to every cell and...
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www.texasheart.org/HIC/ANATOMY/
www.texasheart.org/HIC/ANATOMY/
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The highway system of the Circulatory System consists off a lot of one way streets. The superhighways of the circulatory system are the veins and arteries. Veins are used to carry blood *to* the heart. Arteries carry blood *away* from the heart.
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www.globalclassroom.org/hemo.html
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Circulatory System - Activities to use when teaching about the human heart and circulatory system.... source; ... Make a Batch of Blood - Discussion outline for introducing the heart and the circulatory system. Includes a "recipe for blood" using candy red hots, white jelly beans and corn syrup source;
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www.proteacher.com/110074.shtml
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Open circulatory systems (evolved in insects, mollusks and other invertebrates) pump blood into a hemocoel with the blood diffusing back to the circulatory system between cells. Blood is pumped by a heart into the body cavities, where tissues are surrounded by the blood.
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www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookcircS...
www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookcircSYS.html
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On average, your body has about 5 liters of blood continually traveling through it by way of the circulatory system. The heart, the lungs, and the blood vessels work together to form the circle part of the circulatory system.
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www.fi.edu/learn/heart/systems/circulation.html
www.fi.edu/learn/heart/systems/circulation.html
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