Question | Answer |
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 |