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Published byAubrie Rich Modified over 9 years ago
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Blood Vessels
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Vascular System Blood circulates inside blood vessels, which form a closed transport system, the vascular system. This idea, that blood circulates, is not even 400 years old - William Harvey, English physicican Greeks believed blood was like a tide
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Blood Vessels As heart beats, blood is propelled into the large arteries leaving the heart. (artery=away) Moves into smaller arteries, and then into arterioles, which feed the capillary beds in tissues.
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Blood Vessels Capillary beds are drained by venules, which in turn empty into veins. Veins return blood to the venae cavae, the great veins, which enter the heart (SVC / IVC) Capillary beds are where the exchange between tissues and blood occurs.
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Anatomy of blood vessels Walls of blood vessels have three layers, or tunics: – Tunica intima - innermost – Tunica media – changes diameter – Tunica externa - outermost
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Carotid Brachial Artery bypass http://www.youtube.com/watch?v=1VLII3quG 5k&feature=player_embedded#at=247 http://www.youtube.com/watch?v=1VLII3quG 5k&feature=player_embedded#at=247
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Time to name those vessels!
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