The Circulatory System
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Created by:
saddleup4Jesus on March 11, 2008
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16 terms
Terms | Definitions |
|---|---|
 functions of the circulatory system | Pump; blood transport system around body; carries oxygen and nutrients to cells, carries away waste products; Lymph system- returns excess tissue fluid to general circulation. |
| parts of the circulatory system | Heart, arteries, veins, capillaries, blood, and lymph. |
| heart facts | Muscular organ; size of a closed fist; weighs 12-13 oz; located in thoracic cavity. |
| structure of heart | Hollow, muscular, double pump that circulates blood. At rest it pumps 2 oz of blood with each beat- that's 5 qts/min and 75 gal/hr. Average 72 bpm and 100,000 beats per day. Has 4 chambers: 2 atrium and 2 ventricles. |
| tricuspid valve | Located between right atrium and right ventricle. |
| bicuspid (mitral) valve | Located between left atrium and left ventricle. |
| pulmonary semilunar valve | Located between right ventricle and pulmonary artery. |
| aortic semilunar valve | Located between left ventricle and the aorta. |
| valves | Structures inside the heart that prevent the back flow of blood. |
| myocardium | Muscular layer of heart. |
| pericardium | Double layered membrane or sac that covers the outside of the heart. |
| endocardium | The smooth layer of cells that lines the inside of the heart. |
| septum | A muscular wall that separates the heart into a right and left side. |
| apex | The tip of the heart that lies on the diaphragm and points to the left side of the body. |
| coronary arteries | Vessels that are located on the outer surface of the heart to provide its oxygen. |
| pericardial fluid | Fluid that prevents friction between the layers of the pericaridum. |
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