In humans,the ...... is a blind sac which hosts some symbiotic microorganisms.

In humans,the Sphincter of Oddi is located in the .......

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.

What is the another name of gastro-oesophageal sphincter?

Pyloric constriction is the narrowing of the portion between

Analogy type question:
$(1)$ Teeth embedded in the socket of the jaw bone : Thecodont : Teeth that replace milk teeth : ...........