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| proteinaceous pores that exist in the intestional epithelial cells of most animals. These pores allow for the passage of nutrients, as well as providing a channel for intracellular communication |
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| end-to-end attachment sites between adjacent cardiac muscle cells. The disks securely fasten the cells together and also transmit impulses from cell to cell |
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| Sinoatrial node (SA node) |
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| located in the right atrium and is the pacemaker of the heart |
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| Atrioventricular Node (AV node) |
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| impulses generated from the SA node travel quickly across these specialized, fast-conducting muscle fibers |
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| after the delay of the AV node, the electrical impulse resumes its speedy journey, this time through these specialized fibers in the ventricls |
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| the part of the cardiac cycle associated with contraction of the ventricules and atria and ejection of blood into the arterial systems |
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| severely abnormal heart rhythem that can be life threatening |
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| relaxation of smooth muscle cells within the vessel walls, particulary in large arteries, small arterioles and large veins |
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| narrowing of the blood vessels resulting from contraction of the muscular wall of the vessels, particulary large arteries, small arterioles and veins |
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| a physiological process involving the growth of new blood vessels from pre-exhisting blood vessels |
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| process in which small (normally closed) arteries or different parts of the same artery |
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| a conditions of the capillary wall structure that allows blood elements and waste products to pass through the capillary wall to tissue spaces |
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| blood vessels that carry oxygenated blood away from the heart |
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| a small diameter blood vessel in microcirculation that extends and branches out from an artery and leads to capillaries |
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| the smallest of a body's blood vessels and are part of microcirculation. Enable the exchange of oxygen, water and carbon dioxide |
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| blood vessel that allows deoxygenated blood to return from the capillary beds to the larger blood vessels called veins |
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| blood vessels that carry blood towards the heart |
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