Term
|
Definition
| Closed system, heart to arteries to arterioles to capillaries converge with venules to veins back to heart. |
|
|
Term
|
Definition
| Sends deoxygenated blood to lungs to unload carbon dioxide and pick up oxygen |
|
|
Term
|
Definition
| Sends oxygenated blood and nutrients to all body cells and removes wastes |
|
|
Term
|
Definition
| R atrium -> tricuspid valve -> R ventricle -> pulmonary semilunar valve -> pulmonary arteries -> lungs -> pulmunary veins -> L atrium -> bicuspid valve -> L ventricle -> aortic semilunar valve -> aorta -> systemic circulation |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| Lines the internal surface of the fibrous pericardium |
|
|
Term
|
Definition
| Lines the surface of the heart. Epicardium. |
|
|
Term
|
Definition
| Protects and anchors the heart, prevents overfilling the heart with blood, reduces friction in the heart. |
|
|
Term
|
Definition
| Cardiac muslce layer forming the bulk of the heart |
|
|
Term
|
Definition
| edothelial layer of the inner myocardial surface, contains blood vessels and Perkinje Fibers. |
|
|
Term
|
Definition
| Receiving chambers of the heart, each has protruding auricle. |
|
|
Term
|
Definition
| Discharging chambers of the heart, papillary muslces and trabeculae carneae muslces. |
|
|
Term
|
Definition
| Ensure unidirectional blood flow through the heart. |
|
|
Term
|
Definition
| Between the atria and ventricles. Right AV valve is tricuspid valve, left is bicuspid valve. They prevent backflow into the atria when ventricles conctract. |
|
|
Term
|
Definition
| Between left ventricle and aorta, 3 cusps. |
|
|
Term
| Pulmonary Semilunar Valve |
|
Definition
| Between right ventricle and pulmonary trunk, 3 cusps. |
|
|
Term
|
Definition
| Prevent backflow of blood into the ventricles. |
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
| Generates impulses about 75 times/minute, located in right atrium |
|
|
Term
| Atrioventricular (AV) Node |
|
Definition
| Delays the impulse 0.1 second to allow atria to respond and complete contraction before the ventricles contract. |
|
|
Term
|
Definition
| Central blood-containing space surrounded by tunics |
|
|
Term
|
Definition
| Three types: tunica interna (lines the lumen of all vessels), tunica media (controls vasoconstriciton/vasodilation of vessels), and tunica externa (protect and reinforce vessels) |
|
|
Term
|
Definition
| Offers little resistance to flow |
|
|
Term
|
Definition
| Resembling semilunar hart valves, they prevent the backflow of blood |
|
|
Term
|
Definition
| Provide alternate pathways for blood to reach a given body region |
|
|
Term
|
Definition
| Blood viscosity, total blood vessel length, and blood vessel diameter |
|
|
Term
|
Definition
| "Stickiness" of the blood |
|
|
Term
|
Definition
| The longer the vessel, the greater the resistance countered |
|
|
Term
|
Definition
| Changes in vessel diameter are frequent and significantly alter peripheral resistance |
|
|
Term
|
Definition
| Respiratory "pump" sucks blood toward the heart during breathing by squeezing local veins. Muscular "pump" contracts skeletal muscle's milk blood toward the heart. And valves prevent backflow |
|
|
Term
|
Definition
| Low BP, systolic pressure below 100 mm Hg |
|
|
Term
|
Definition
| Elevated arterial pressure of 140/90 or higher |
|
|
Term
|
Definition
| Counteract moment-to-moment fluctuations in blood pressure by altering peripheral resistanec |
|
|
Term
|
Definition
| Alter blood volume, baroreceptors stimulate kidneys to increase or decrease water. |
|
|
