Rio Bio 202 Exam 2
Tunica Intima correct answersinternal-contains endothelium
Tunica Media correct answers(middle)-layers of elastin and smooth muscle cells, where vasoconstriction/dilation occurs
Tunica Externa correct answers(external)-loosely woven collagen fibers, also contains nerves/elastin fibers/lymph vessels
Elastic Arteries correct answers(Conducting)-located near the heart, aorta and branches, largest in diameter
Muscular Arteries correct answers(Distributing)-majority of 'named' arteries, deliver blood to specific organs
Arterioles correct answerssmallest of arteries, determine blood flow into capillaries through constriction/dilation
Continuous Capillaries correct answersabundant in muscles/skin, tight junctions formed by endothelial cells gaps in those junctions=intercellular clefts, compile *blood brain barrier*
Fenestrated Capillaries correct answersendothelial cells contain pores or fenestrations, found in the kidneys
Sinusodal Capillaries correct answers-'leaky' capillaries, found in *liver, bone marrow, lymph and endocrine tissues*, contain large intercellular clefts
Venules correct answersbegin at capillaries, extremely porous, fluids/WBCs move easily in and out Veins correct answers*thinner walls, larger lumens compared to arteries*
veins hold a large blood volume
Contain *venous valves (prevent backflow of blood)*
Microcirculation correct answersflow of blood through capillary bed from arteriole to venule
2 types of vessels in capillary beds correct answersVascular shunt, true capillaries
Vascular Shunts correct answersconnects arteriole and venule
True Capillaries correct answersexchange vessels
Pulmonary Circulation correct answersRight Ventricle --> Pulmonary trunk --> Right and Left Pulmonary Arteries --> Lobar Arteries --> Arterioles --> Pulmonary Capillaries (site of gas exchange) --> Venules --> Pulmonary Veins --> Left Atrium
Hepatic Portal System correct answersserves to carry blood from the digestive organs containing nutrients to the liver
Portal System correct answers"vein" circuit involving veins to capillaries to veins
Superior Mesenteric Vein correct answers-emptying from small intestine, ascending and transverse large intestine, and stomach
Splenic Vein correct answers-joins with superior mesenteric vein to comprise hepatic portal vein
-drains spleen
-part of stomach and pancreas
Inferior Mesenteric Vein correct answers-joins splenic vein right before junction with superior mesenteric vein
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