Chewing

Chewing is a [blank_start]mechanical[blank_end] process by which foods are ground and [blank_start]crushed[blank_end] into smaller [blank_start]chunks[blank_end] to [blank_start]facilitate[blank_end] their digestion.

Teeth are formed by

What kind of teeth are these?

A dental formula is the way of representing the number and type of a mammal's teeth by numbering them in the following way: eight numbers separated by a line, four on the upper jaw and four on the lower jaw, that identify the number of [blank_start]incisors[blank_end], [blank_start]canines[blank_end], [blank_start]molars[blank_end] and [blank_start]premolars[blank_end] located in the middle, upper and lower jaws, respectively.

The baby teeth are formed by...

The adults have got...