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Cards In This Set
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What is the most common circulatory route?
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Heart-arteries-arterioles-capillaries-venules-veins
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What are examples of portal systems in the body?
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Hypothalamus to anterior pituitary gland, the kidneys, small intestine to the liver
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What is the point of exchange between the blood and the tissues that is responsible for gas and nutrient exchange?
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Capillaries
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What is the name for alternate pathways?
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Anastomoses
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What is the type of anastomoses that is directly from an artery to a vein, that does not go through capillary beds, minimizes heat loss, and helps conserve body heat to keep the rest of the organs alive?
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Arteriovenous shunt
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What is the type of anastomoses that merges 2 veins, which provides alternate drainage of organs?
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Venous anastomoses
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What is the type of anastomoses that merges 2 arteries, to provide other routes of blood flow and is common around the joints?
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Arterial anastomoses
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What is the largest vein in the body?
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Inferior vena cava
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What is the largest artery in the body?
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Aorta
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What are the least complex and smallest vessels in the body?
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Capillaries
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What is the outermost layer of the vessel wall and what is it composed of?
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Tunica externa, loose connective tissue (anchors bv in place)
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What is the middle layer of the vessel wall and what is it composed of?
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Tunica media, smooth muscle and collagen
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Which layer of the vessel wall is the thickest?
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Tunica media
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Which layer of the vessel wall is responsible for vasoconstriction and vasodilation?
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Tunica media
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What are the small vessels that supply blood to the tunica externa of large blood vessels?
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Vaso vasorum
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