Biology 20 - Patricia Schwandt Courses

Biology 20. Circulatory System. General Outcome 2 – Students will explain the role of the circulatory and defence systems in maintaining an internal equilibrium. A. Functions of the Circulatory System . Circulatory systems can be either open or closed. Open systems. do not have the blood contained to vessels – insects. Closed systems. have all of the blood moving through the body via ... ................
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