This is a teaching tool designed to aid teachers in explaining to DP students how the different systems of the human body work. The essential ideas and understandings explained include digestion and absorption, gas exchange (inhalation and exhalation), blood or circulatory system (with specific references to the pacemaker and cardiac cycle), defense against infectious diseases (immune system and pathogens), neurons and synapses (nervous system) and finally the endocrine system (hormones, homeostasis and reproduction.
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