Diaphragm, The dome shaped muscle below the rib cage., Exhalation, The process in the figure is:, Trachea, Part A is called, relaxing, During this process muscle B is:, CO2, Gas A is:, O2, Gas B is:, E, Blood vessel that carry blood away from heart, A, a structure that is important to prevent backword movement of blood, B, Endothelium, D, Thin and wide vessel

Grade 12 Part 2

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