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Definition
| A circulatory system in which fluid called hemolymph bathes the tissues and organs directly and there is no distinction between the circulating fluid and the interstitial fluid. Ex.insects, spiders, and mollusks. |
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| Closed Circulatory System |
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Definition
| A circulatory system in which blood in confined to vessels and kept separate from the interstitial fluid. Ex: Earthworms and Humans |
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Definition
| Chamber that receives blood entering the heart. |
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Definition
| Chambers responsible for pumping blood out of the heart. |
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Definition
| Carry blood away from the heart to organs throughout the body. |
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Definition
| Small vessels that convey blood to capillaries. |
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Definition
| Microscopic vessels with very thin, porous walls. Chemicals(O2 in & CO2 out) are exchanged by diffusion between the blood and the interstitial fluid around the tissue cells. |
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Definition
| A vessel that conveys blood between a capillary bed and a vein. |
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Definition
| Vessels that carry blood back to the heart. |
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Definition
| The branch of the circulatory system that supplies all body organs except those involved in gas exchange. |
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Definition
| A circulatory system consisting of separate pulmonary and systematic circuits, in which blood passes through the heart after completing each circuit. |
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Definition
| The branch of the circulatory system that supplies the lungs. |
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Definition
| In invertebrates with an open circulatory system, the body fluid that bathes tissues. |
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Definition
| A central cavity that with a single opening in the body of certain animals that functions in both the digestion and the distribution of nutrients. |
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Definition
| The stage of the cardiac cycle in which a heart chamber contracts and pumps blood. |
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Definition
| The stage of the cardiac cycle in which a heart chamber is relaxed and fills with blood. |
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Definition
| A region in the right atrium of the heart that sets the rate and timing at which all cardiac muscle cells contract; the pacemaker. |
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Definition
| A region of specialized heart muscle tissue between the left and right atria where electrical impulses are delayed for about 0.1 seconds before spreading to both ventricles and causing them to contract. |
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Definition
| A system of vessels and nodes, separate from the circulatory system, that returns fluid, proteins, and cells to the blood. |
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Definition
| An organ located along a lymph vessel. Lymph nodes filter lymph and contain cells that attack viruses and bacteria. |
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Term
| Red Blood Cells(Erythrocyte) |
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Definition
| A blood cell that contains hemoglobin, which transports oxygen. |
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Definition
| An iron-containing protein in red blood cells that reversibly binds oxygen. |
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| White Blood Cell (Leukocyte) |
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Definition
| A blood cell that functions in fighting infections. |
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Term
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Definition
| A pinched-off cytoplasmic fragment of a specialized bone marrow cell. Platelets circulate in the blood and are important in blood clotting. |
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