Details Title: Blood Vessels Description: a and p Total Flash Cards: 6 Created: 03/03/2007 17:05:03		New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE. Existing Users: CLICK HERE. Additional Physiology Flashcards
Cards in this set: Term Tunica Interna (Intima) Definition * simple squamous endothelium * contiuous with endocardium of the heart * reduces friction between vessel walls and blood Term Tunica Media Definition * controls vasodilation/constriction * smooth muscle and sheets of elastin * regulated by sympathetic nerves Term Tunica Externa Definition * protects, reinforces and anchors vessels to surrounding structures * large woven collagen fibers * in larger vessels: vaso vasorum is blood supply for the tunica externa (vessels of the vessels) Term Elastic (Conducting) Arteries Definition * contain large amounts of elastin * largest in diameter * able to withstand pressure * expand and recoil passively to accomodate changes in blood volume. Term Muscular (Distributing) Arteries Definition * Deliver blood to specific organs * have greatest proportion of tunica media * have more smooth muscle in tunica media than elastin * have elastic lamina on each face of tunica media Term Arterioles (resistance vessels) Definition * smallest arteris * regulate blood flow into capillary beds through vasoconstriction/dilation * determine amount of profusion to tissue