May
11 June 2007
plant matter is hard to digest, so herbivores have many molars for chewing.
humans are diphyodont, meaning that they develop two sets of teeth.
the first set (the "baby," "milk," "primary" or "deciduous" set) normally starts to appear at about six months of age, although some babies are born with one or more visible teeth, known as neonatal t
normal tooth eruption at about six months is known as teething and can be quite painful for an infant.
some animals develop only one set of teeth (monophyodont) while others develop many sets (polyphyodont).
sharks, for example, grow a new set of teeth every two weeks to replace worn teeth.
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