Anatomy and Physiology Essay

The primal goal of this lab is to learn the names of many blood vessels. You will use the models provided as vigorous as pictures in your lab book.Microscopic Structure of prodigal Vessels tunica intima lines the lumen of the blood vessel. endless with endocardium of heart. Is extremely smooth to decrease resistance to blood flow. (Made of epithelium)Tunica media More bulky middle coat. calm of smooth muscle and elastin. Regulation in the diameter of blood vessels, which alters peripheral resistance and blood storm.Tunica externa (adventitia) Outermost tunic. Function is primarily supportive and protective (areolar and fibrous CT)PictureGeneralized Structure of Arteries, Veins and CapillariesTypes of Blood VesselsElastic arteries Contain much elastic tissueLarger arteries belt upr to the heartMust boom when heart pumps much blood into them and then passively recoil after blood passes by.Thus, must hold pressure fluctuationsMuscular arteries capture less elastic tissue, but s ubstantial muscle tissue small arteries farther from heartExposed to less extreme pressure fluctuationsVeins Far from heartNot subjected to pressure fluctuationsAre low pressure vessels thus are thin walledBlood flows against gravity so1. Have larger lumens2. Have valves to prevent backflow3. Skeletal muscle pumpCapillaries Tiniest vesselsOne cell stage thick endothelium with underlying basal lamina (tunica intima)Thinnest for making exchanges between blood and tissue cellsActivity One notice a vein and an artery on a microscope slide.Major Systemic Arteries of the BodyActivity 2 consumption the models provided to find arteries listedUse pictures on the following pages to assistBoth models and pictures will be use on the testMajor Systemic Veins of the BodyActivity ThreeUse the models provided to find veins listedUse pictures on the following pages to assistBoth models and pictures will be used on the test excess CirculationsPulmonary CirculationDoes not serve metabolic needs of b ody tissuesFunction is to bring blood close to alveoli in order do gas exchangePulmonary arteries are structurally similar to veins establish a low pressure bed in the lungsCarry deoxygenated blood from heart to lungsPulmonary veins