Anatomy and Physiology Essay

The basal goal of this lab is to learn the names of many tear vessels. You impart use the models provided as well as pictures in your lab book. microscopic anatomical structure of Blood VesselsTunica intima lines the lumen of the blood vessel. Continuous with endocardium of heart. Is exceedingly smooth to decrease resistance to blood f junior-grade. (Made of epithelium)Tunica media More extensive middle coat. Composed of smooth muscle and elastin. Regulation in the diameter of blood vessels, which alters peripheral resistance and blood pressure.Tunica externa (adventitia) Outermost tunic. purpose is primarily supportive and protective (areolar and fibrous CT)PictureGeneralized Structure of Arteries, Veins and CapillariesTypes of Blood VesselsElastic arteries Contain much elastic tissue big arteries closer to the heartMust expand when heart pumps much blood into them and then passively recoil after blood passes by.Thus, must concur pressure fluctuationsMuscular arteries Have little elastic tissue, but existent muscle tissueSmaller arteries farther from heartExposed to less extreme pressure fluctuationsVeins Far from heartNot subjected to pressure fluctuations are low pressure vessels thus are thin walledBlood flows against soberness so1. Have larger lumens2. Have valves to prevent backflow3. penurious muscle pumpCapillaries Tiniest vessels i cell layer thick endothelium with rudimentary basal lamina (tunica intima)Thinnest for making put backs between blood and tissue cellsActivity OneObserving a vein and an artery on a microscope slide.major(ip) Systemic Arteries of the BodyActivity Two using up the models provided to find arteries listedUse pictures on the following pages to assist two models and pictures will be utilize on the testMajor Systemic Veins of the BodyActivity tripletUse the models provided to find veins listedUse pictures on the following pages to assistBoth models and pictures will be used on the testSpecial Circulationspulmonary CirculationDoes not serve metabolic needs of body tissuesFunction is to carry blood close to alveoli in order do gas exchange pneumonic arteries are structurally similar to veinsCreate a low pressure bed in the lungsCarry deoxygenated blood from heart to lungsPulmonary veins