Question

(i) (a) is made of single thin layer of flattened cells with regular boundaries.
(ii) (b) is commanly found in ducts of glands & nephrons.
(iii) (a) is found in walls of blood vessels and air sacs of heart and are involved in a function like diffusion boundaries
(iv) Both (a) & (b) are included under simple
epithelium.

Choose the option with correct statement

• A. ii & iv
• B. i & iii
• C. i, ii & iii
• D. ii, iii & iv

Answer 1

The correct option is D ii, iii & iv

The sketch A represents the squamous epithelium The squamous epithelium is made of a single thin layer of Flattened cells with irregular boundaries. They are found in the walls of blood vessels and air sacs of lungs and are involved in functions like forming a diffusion boundary.
The sketch B represents the cuboidal epithelium. The cuboidal epithelium is composed of a single layer of cube-like cells. This is commonly found in ducts of glands and tubular parts of nephrons in kidneys and i ts main functi ons are secretion and absorption.
They are both types of simple epithelium.