BIO 012 Lecture Notes - Lecture 20: Circulatory System, Hemolymph, Extracellular Fluid

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14 Nov 2016
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It is a system composed of a major pump (the heart), a fluid (ie blood or hemolymph), and a series of passages for the travel of the fluid (vessels) Types of things that travel in blood/hemolymph: essential nutrients, vitamins, oxygen, water, cell waste products, etc. Because this course is a discussion of animal form and function, the concept of an open circulatory system must be discussed. If the entire system is not completely enclosed in discrete vessels, then the system is an open circulatory system. Hemolymph- a fluid that is composed of both blood and extracellular fluids. Hemocoel- a cavity located within the open circulatory system that is where hemolymph is released into after exiting the heart. Works by having a heart pump hemolymph to all surrounding organs so that the hemolymph can filter through it. Hemolymph reenters the heart through small openings called ostia.

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