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18 Cards in this Set
- Front
- Back
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PORTAL SYSTEM
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two capillary beds between an artery and vein
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HEPATIC PORTAL SYSTEM
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2 capillary beds, 1st around gut and stomach, 2nd around liver
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CIRCLE OF WILLIS
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arterial anastomosis in brain around internal corotid, so if vessels are cut, blood can still get around....... Collateral bloodflow!
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CEREBRAL VASCULAR ACCIDENT (CVA)
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stroke
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ANEURYSM
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weak point in an artery or heart wall - bulges, filled with plaque. sometimes bursts
- common in abdominal aorta renal arteries & brain |
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WHAT DOES THE DIRTY CSF FROM THE SINUSES IN THE HEAD DRAIN INTO?
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internal jugular (vein)
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PRECAPILLARY SPHINCTERS
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between vessels and capillary bed
- controllled by ANS, more specifically the sympathetic system - opened depending on blood need |
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ARTERIOVENOUS ANASTOMOSIS
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artery to vein without intervening capillary bed
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ARTERIAL ANASTOMOSES
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artery to artery without intervening capillary bed - collateral bloodflow (blood gets to all places at all times)
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VENOUS ANASTOMOSES
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one vein to another without intervening capillary bed
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TUNICA INTIMA
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most inner layer(s) of vessels
- included in all vessels/capillaries - consists of endothelial cells on a basement membrane |
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TUNICA MEDIA
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layer in between tunica intima and tunica externa on vessels
- smooth muscle - collagen - some elastin (elasticity) |
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TUNICA EXTERNA
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outermost layer of vessels
- loose connective tissue - vasa vasorm (only in large vessels) |
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ORDER OF VEINS, largest to smallest
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large vein, medium sized vein, VENULE, (capillary)
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ORDER OF ARTERIES, largest to smallest
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large artery, medium sized artery, ARTERIOLE, (capillary)
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WHEN YOU CONTRACT YOUR LEG MUSCLES, WHAT HAPPENS TO THE VALVES IN YOUR VEINS?
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They open and blood travels upward (backflow closes the valves so the blood stays)
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WHERE IN THE BODY DO YOU NOT FIND LYMPH VESSELS?
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CNS, cartilage, cornea, bone
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WHAT FLOWS INTO LYMPH CAPILLARIES?
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tissue fluid
- fluid - bacteria - lymphocytes - other cells & particles |
