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AP2 Blood Vessels

arterial carries blood AWAY from heart, Oxygenated, Macroscopic
arteries few in numbers, thicker walled, larger lumen
arterioles greater in number, thinner walled, smaller lumen
venous RETURN blood to the heart, Deoxygenated, Macroscopic
veins fewer in number, thicker walled, larger lumen, must return blood to heart against gravity, have valves, can collapse
venules most numerous os all blood vessels, microscopic, thinnest walled, smallest luman, exchange of materials between blood and surrounding tissues
layout closed cirulatory system, one directional, rapid, efficient circulation, sufficient pressure to and fron heart, prevents backflow, ensures proper oxygenation
tunica adventitia outermost layer, fibrous connective tissue with collagenous fibers, strenght and protection, arteries and veins only, thicker in veins
tunica media middle layer, smooth muscle tissue & elastic fibers, contractility, elastic fibers allow elasticity and recoil, arteries and veins only, thicker in arteries
tunica intimia innermost layer, endothelium, blood to flow smoothly through the arterial and venous vessels (decreases resistance to blood flow), allows for diffusion/filtration in capilaries (where exchange of materials occurs), in all three vessels
pulmonary begins with the R ventricle ends with L atrium, DEOXYGENATED blood to lungs for gas exchange
systemic begins with L ventricle ends with R atrium, OXYGENATED blood to body systems
coronary begins with acending arota, OXYGEN rich blood nurishes heart itself
fetal oxygen to developing fetur via umbical vein, removes carbon dioxide and wastes via umbical arteries
portal blood must go to a specific organ before returning to general circulation, generally an extra set of vessels associated with the specific organ
arterial between hypothalamus and pituitary
hepatic associated with digestive system, from digestive organs goes to liver before returning to general circulation
splenic and superior mesenteric veins merge to form the hematic portal vein, liver functions to detoxify and process/store nutrients
Created by: absolutkm1



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