heart notes
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30 terms
Terms | Definitions |
|---|---|
 blood | liquid medium of transport |
| heart | pump that generates pressure |
| blood vessels | distribution tubes of varying diameters (3 types) |
| thoracic | heart is located in the ________cavity |
| pericardium | membrane that surrounds the heart and secretes a fluid to reduce friction as the heart beats |
| atria | upper chambers of the heart |
| ventricle | lower chambers of the heart |
| septum | vertical "wall" of tissue that divides left from right |
| lungs | right side of the heart pumps to the _______ |
| left | ______side of the heart pumps to the body |
| pulmonary system | this system transports blood to and from the lungs |
| right ventricle | ________pushes oxygenation blood to the lungs where carbon dioxide is released and oxygen is picked up |
| systemic system | when blood goes from the left ventricle to the rest of the body |
| valve | flaps of tissue that only opens in one direction |
| semilunar valves | this separates ventricles from vessels and prevent the backflow of blood |
| arteries | these carry blood away from the heat, they have three layers |
| 120/80, 110/70 | normal blood pressure for men and women |
| hypertension | another word for blood pressure |
| arterioles | arteries lead to smaller vessels called _____, these branch and connect with capillaries |
| capillaries | these connect with venules |
| venules | one cell thick, place for gas and nutrient exchange; these connect with veins which carry blood back to the heart |
| superior vena cava | drains from the head |
| inferior vena cava | drains from the body |
| systole | contraction of the heart |
| diastole | relaxation of the hear |
| lub | sound hear makes when the AV valves close |
| dub | sound heart makes when the semilunar valves close |
| sinoartial node | cardiac pacemaker; regulates the rate of contraction and stimulates its own electrical charge |
| atrioventricular node | this node is located between the atria and ventricles; stimulates Purkinje fibers |
| Purkinje fibers | fibers that carry electrical impulses to distant regions of the ventricles; located down the septum |
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