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Cards In This Set
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Name the 3 types of blood vessels
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Arteries, veins, and capillaries
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Name and describe the structure of arteries and veins
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Arteries: arteries have three layers: a smooth inner layer; a strong, muscular layer; and a thin outer layer; connective fibers in artery walls allow for the elasticity needed for the artery to function; arteries are usually larger than veinsVeins: veins also have three layers: a thin outer layer, a middle layer and a smooth inner layer; veins are less muscular than arteries and have less elasticity
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How can medium-sized arteries control the distribution?
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Vasoconstriction- narrowingvasodilation- enlarging
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How do arterioles regulate blood flow?
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Precapillary sphincter
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Describe the structure of capillaries
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Single layer of endothelial cells, thin walls
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Describe the differences between veins and capillaries
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venules drain blood from capillaries to larger veinsvenules are smaller
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Explain how veins return blood to the heart
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Valves: endothelial tissue & skeletal muscles
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What are the 3 circulatory routes?
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Pulmonary, systematic, heptic portal
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Describe (list the path of) the pulmonary circulation
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Blood carried from right ventricle to lungs and back to left atrium and then left ventricle right ventricle-semilunar valve-pulmonary trunk-pulmonary arteries-lungs-pulmonary veins-left atrium-bicuspid-left ventricle
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Describe the systematic circulation
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Carries blood from left ventricle to all body parts and back to the right atrium
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Describe the portal circulation
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Blood supplied to intestine by superior and inferior mesentric arteries
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List the factors that affect blood pressure
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Vessel elasticity, cardiac output, blood volume, peripheral resistance
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What is the difference between a red out and a black out?
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Black out: when you quickly accelerate "upwards" relative to your seating position, effectively causing blood to rush away from your brain toward your legsred out: accelerating "downward" too quickly, causing a large amount of blood rushing to your brain and away from your lower body
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What is meant by the term the heart is phasic?
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Follows a pattern
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What is blood viscosity?
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A measurement of the thickness and stickiness of an individual's blood
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