The cellular layers in the epidermis of the skin consist of:

The ciliated columnar epithelial cells in humans occur in

Assertion: The squamous epithelium is made of a single thin layer of flattened cells with irregular boundaries.
Reason: They are found in walls of blood vessels and air sacs of lungs.

Which of the following is a characteristic feature of epithelial tissue?

Junction which facilitates the exchange of small and sometimes big molecules is $:-$

The walls of capillaries are composed of endothelium,which is: