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a watery fluid secreted into the alimentary canal.
the first step of cellular respiration in which glucose is converted to pyruvic acid with small...
a sticky film that forms on the enamel of teeth. It is made up of small food particles, saliva...
this muscle 'opens' or straightens the joint when it contracts (so the angle between the two...
a fine thread-like structure. In plants: the stalk of the male sexual organ.