Goblet cells secrete

Which of the following organs is present in the abdominal cavity,just below the diaphragm?

The liver is called a reticular gland because:

$A$ unique vascular connection between the digestive tract and liver is called

The pulp cavity of the tooth is lined by .......

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.