The word epithelium was coined by

Which of the following statements is/are correct regarding epithelial tissue?
$a$ - Cells are compactly packed.
$b$ - Cells have little intercellular matrix.
$c$ - It can be single or multi-layered.

The inner surface of the stomach, rectum, and large intestine is lined by which type of epithelium?

Ciliated columnar epithelial cells in humans are found in . . . . . . .

Choose the correct sentences for compound epithelium:
$(I)$ Compound epithelium is made of multi-layered cells.
$(II)$ It has a limited role in secretion and absorption.
$(III)$ It provides protection against chemical and mechanical stresses.
$(IV)$ It is present in $PCT$.

Which protein is responsible for skin color?