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Definition
| vessel that carries blood away from the heart |
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| structure in the lymphatic system that contains white blood cells and fights infection |
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| abdominal organ that produces and stores lymphocytes and destroys worn-out red blood cells |
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| lymphoid organ in the upper chest where T-cells learn to distinguish foreign from self-antigens |
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| vessel that returns blood to the heart |
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| relaxation of the heart muscle |
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| specialized cardiac muscle cells that help control heartbeat |
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| tiny vessel that connects an arteriole with a venule |
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| blood circulation between the heart and lungs |
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| blood circulation between the heart and the rest of the body, except the lungs |
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| blood circulation between the heart and the rest of the body, except the lungs |
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| contraction of the ventricles of the heart |
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| specialized cardiac muscle cells that set the pace of the heartbeat; the pacemaker |
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| form of passive transport in which a solute moves down its concentration gradient without the use of a transport protein |
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| circulatory system in which blood circulates freely through the body cavity |
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| closed circulatory system |
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| circulatory system that confines blood to vessels |
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| single loop, two-chambered heart |
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| amphibian circulatory system |
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Definition
| pulmonary (with cutanous breathing) and systemic circuits, three-chambered heart |
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Term
| bird and mammal circulatory system |
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Definition
| pulmonary and systemic circuits, four heart chambers |
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Term
| atrium, right ventricle, pulmonary arteries, pulmonary veins, left atrium, left ventricle, aorta |
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Definition
| order of blood circulation through chambers and vessels |
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| the resting period, blood fills the heart chambers, pressure is at its lowest |
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| active period, atria contract, sending blood to ventricles, ventricles contract, sending blood to the aorta or pulmonary artery |
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| collect excess fluid that leaks out of capillaries in the tissues of the body |
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