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A&P II Exam 2

Covers blood, vascular system, immune system, and lymphatic system

QuestionAnswer
What are arteries? blood vessels that carry blood away from heart, control distribution, muscular wall
What are arterioles? teeny arteries, arterial flow often said to ‘perfuse’ as in the inferior mesenteric artery perfuses the large intestine. Thin walls with three tunicas, controls blood flow to tissues, feed capillary beds
What are cappilaries? exchange system, some are toward arteriole side, some more toward venule side
What is a venule? teeny veins, smaller ones only have tunica intima, larger ones have 3 tunics. They drain cappilary beds
What is a vein? carry blood to heart or flow toward heart, some specialized venous networks may perfuse thru other organs on way to heart (portal system) often say they ‘drain’. Thin-walled vessels with large lumen, little smooth muscle, and valves.
Where is most of the blood? In the systemic veins
Elastic Arteries Large Artery with well developed elastic lamina, they conduct blood in high pressure areas to organs
Muscular Arteries Thick walled arteries with well developed tunica media, controls blood flow to organs, regulate blood pressure
What characteristics play a role in blood pressure? Blood volume(water loss through kidneys and water gain), cardiac output (stroke volume and heart rate), peripheral resistance (obstructions, vessel length, blood viscosity, and vessel radius)
What does the tunica intima consist of? endothelium, basal lamina, subendothelial connective tissue, internal elastic lamina
What does the Tunica media consist of? smooth muscle cells and external elastic lamina
What does the Tunica externa consist of? tunica adventitia
Created by: alannalazerus
 

 



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