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an infectious disease of the digestive system that is characterised by diarrhoeaandbloodinthe faeces; it is caused by Entamoeba histolytica
the process whereby a particular change causes a response which reverses that change.
bitter yellow or green alkaline fluid secreted by the liver, which serves to emulsify fats
the outermost layer of the stele or vascular cylinder in a dicotyledonous plant root. Lateral...
the movement of respiratory gases across a respiratory surface.