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| the motive force for fluid movement in the circulatory system. |
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| spaces surrounding the organs |
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| chambers that receive blood returning to the heart |
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| chambers that pump blood out of the heart |
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| blood travels first to the gills, where it picks up O2 and disposes of CO2 across capillary walls |
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| pulmocutaneous circulation |
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Definition
| blood circuit that leads to gas exchange parts of the body |
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| blood flows to the non-gas-exchange parts of the body |
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| O2 rich blood returning to the heart is pumped into the systemic circ. which supplies organs and returns O2 poor blood to the right atrium |
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Definition
| the contraction phase of the heart cycle |
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| the relaxation phase of the heart cycle |
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| volume of blood per minute that the left ventricle pumps into the systemic circuit |
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Definition
| the amount of blood pumped by the left ventricle in each contraction |
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Definition
| the valve between each atrium and ventricle |
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| valves located at the exits of the heart |
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| rhythmic stretching of the arteries caused by the pressure of blood |
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| "pacemaker"; sets the rate at which cardiac muscle cells contract |
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| specialized muscle tissue that delays SA node impulses to ensure the atria empty completely before the ventricles contract |
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| a single layer of flattened cells lining the lumen of blood vessels, that minimizes resistance to blood flow |
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Definition
| impedance of arteries caused during systole |
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Definition
| cells found in red bone marrow, that form all types of blood cells |
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Definition
| a hormone that stimulates the production of erythrocytes |
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Definition
| plasma protein that serves as an inactive form of fibrin |
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| aggregates into threads to form the framework of a blood clot |
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| the part of an animal where gases are exchanged |
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| a process in fish that increases gas exchange efficiency |
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| found in insects; made up of air tubes that branch throughout the body. The largest branches open to the outside. |
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