Why are human teeth referred to as heterodont and dhypyodont

1.	Why are human teeth referred to as heterodont and dhypyodont
Answer» Heterodont : It is the condition of having different types of teeth. For example humans have four different types of teeth namely incisors, canines, molars and premolars.Diphyodont : The type of dentition characterised by two sets of teeth. First set is of temporary and second is of permanent.

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