Goblet cells of the alimentary canal are modified from:

Given below are two statements.
Statement $I$: Since human beings have different kinds of teeth fitted in two jaws,the dentition is described as diphyodont.
Statement $II$: Human beings have four different kinds of teeth,hence it is described as heterodont.

The portion of the tooth that projects above the gums is . . . . . . .

Brunner's glands occur in

What is the dental formula of an adult human being?

The Sphincter of Oddi is located: