Question

Explain about squamous, cuboidal and columnar epithelium.

Note :- please give the answer in short points which as to remember ina great way.
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Answer 1

$\huge{\underline{\underline{\tt{ANSWER}}}}$

$\Large\rm\underline{Squamous \ epithelium }\::-$

$\:\:\to\:\textsf{Composed of single layer.}$

$\:\:\to\:\textsf{Centrally located "Ovoid nucleus".}$

$\:\:\to\:\textsf{Endothecium of blood vessels.}$

$\:\:\to\:\textsf{Moesothilium of body cavities.}$

$\:\:\to\:\textsf{Walls of bowman's capsule of nephron.}$

$\Large\rm\underline{Cubiodal \ epithelium }\::-$

$\:\:\mapsto\:\textsf{Composed of single layer.}$

$\:\:\mapsto\:\textsf{Cube like cells are centrally located.}$

$\:\:\mapsto\:\textsf{It has a spherical nuclei.}$

$\:\:\mapsto\:\textsf{"Microvill" present in PCT of nephron in this epithelium.}$

$\:\:\mapsto\:\textsf{Found in :}$

• $\textsf{(i) Germinal epithelium}$

• $\textsf{(ii) PCT of nephron}$

• $\textsf{(iii) DCT of nephron}$

$\Large\rm\underline{Columnar \ epithelium }\::-$

$\:\:\hookrightarrow\:\textsf{Composed of single layer.}$

$\:\:\hookrightarrow\:\textsf{Cells contains oval nuclei.}$

$\:\:\hookrightarrow\:\textsf{Located near the bases.}$

$\:\:\hookrightarrow\:\textsf{Mucus - secreting "Goblet cells" are present in some places.}$

$\:\:\hookrightarrow\:\textsf{It is divided into two types :}$

• $\textsf{(i) Ciliated columnar epithelium}$

• $\textsf{(ii) Non-ciliated columnar epithelium}$

Answer 2

Answer:-

squamous epithelium:

☞☞Squamous cells are thin, flat cells that look like fish scales,

☞☞are found in the tissue that forms the surface of the skin,

☞☞the lining of the hollow organs of the body

☞☞The lining of the respiratory and digestive tracts

cuboidal epithelium:

☞☞Simple cuboidal epithelium is a type of epithelial tissue found in the body.

☞☞It is a single layer thick and made of cube-shaped cells

☞☞This type of tissue is found lining parts of the body such as the kidney tubules and walls of the respiratory bronchioles.

columnar epithelium:

☞☞Simple columnar epithelia are tissues made of a single layer of long epithelial cells

☞☞that are often seen in regions where absorption and secretion are important features.

☞☞The cells of this epithelium are arranged in a neat row with the nuclei at the same level, near the basal end.

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