Sphincter of Oddi is present at:

The liver is called a reticular gland because:

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.

Kupffer cells of the liver help in . . . . . . .
$i$. Detoxification
$ii$. Synthesis of vitamin $A, D, K$ and $B_{12}$
$iii$. Emulsification of fats
$iv$. Deamination of amino acids
$v$. Phagocytosis

The following diagram shows the duct system of the liver,gallbladder,and pancreas. Identify the ducts labeled $P, Q$,and $R$.

$A-$ The permanent teeth begin to replace the temporary ones at about the age of six years.
$R-$ This type of dentition is called diphyodont.