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a muscular structure on the floor of the mouth of most vertebrates, which manipulates food for mastication by mixing the food with the saliva. It is the primary organ of taste and, in humans, a secondary function is to assist in the production of certain sounds.
a type of nuclear division during which somatic cells divide into new cells for growth or to...
when the body makes its own antibodies when deliberately exposed to a dead or weakened pathogen...
mass extinction event of 65 million years ago, in which about 85% of all species on Earth died...