01:119:116 Lecture Notes - Lecture 24: Arteriole, Aorta, Smooth Muscle Tissue
21 Apr 2016
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Document Summary
Organisms that don"t have circulatory systems: easy diffusion and gas exchange: cnidarians: have gastrovascular cavity (2 layers, platyhelminthes/planarians: have gastrovascular cavity (many layers); branching, flat, nematodes: have body cavity; fluid circulates during movement circulation. Circulatory systems: circulatory fluid, set of interconnecting vessels, muscular pump (hearts, types. Fluid: blood (confined to vessel) and interstitial fluid. Heart - pump blood through branched draw hemolymph back to heart via pores vessels back to heart. Vertebrate circulation: all includes cardiovascular system (blood & blood vessels: blood vessels (arteries capillaries venules veins) Capillary bed: network of capillaries, infiltrate all tissues. Found between skeletal muscle: pushes blood away from contraction (1 way valve prevents backflow: heart: pumping organ, 2+ muscular chambers. Heart: 2 chambers, 1 atria, 1 ventricle. Heart: 3 chambers, 2 atria, 1 ventricle. Pulmocutaneous: blood to lungs and skin left atrium (only carried blood) ventricle (some mixing) Heart: 4 chambers, 2 atria, 2 ventricles.
