Question

class 9 biology chapter 6 where you can see simple sum of epithelial? what is page no in textbook​

Answer 1

Answer:

squamous  

Squamous epithelial cells are flat and are usually found lining surfaces that require a smooth flow of fluid, such as your blood vessels. They also line areas that require a very thin surface for molecules to pass through, such as the air sacs in your lungs.

cuboidal

Cuboidal epithelial cells, as their name suggests, are shaped like cubes. These are typically found in tissues that secrete or absorb substances, such as in the kidneys and glands.

columnar

Columnar epithelial cells are long and thin, like columns. These are usually found in places that secrete mucus such as the stomach. They can also specialize to receive sensory information in places like taste buds on your tongue and inside of your nose.

Explanation:

Answer 2

It is on page number 73 and 74 of science ncert of class 9.
Btw they are present in:
SKIN
LINING OF MOUTH
INNER LINING OF LUNG ALVEOLI
LINING OF BLOOD VESSELS
KIDNEY TUBULES