Question

differentiate between simple squamous epithelium and stratified squamous epithelium

Answer 1

Difference Between Simple and Stratified Epithelium

Definition

Simple Epithelium: Simple epithelium is the epithelium that is composed of a single layer of cells.

Stratified Epithelium: Stratified epithelium is the epithelium that is composed of multiple layers of cells, stacking on top of each other.

Basement Membrane

Simple Epithelium: All the cells in the simple epithelium are bound to the basement membrane.

Stratified Epithelium: Only the basal cell layers are bound to the basement membrane of the stratified epithelium.

Occurrence

Simple Epithelium: Simple epithelium is found in places where absorption, secretion, and filtration occur.

Stratified Epithelium: Stratified epithelium is found in high abrasion areas where protection is needed.

Protective Role

Simple Epithelium: Simple epithelium is not involved in protection since it can be easily damaged by chemical or mechanical abrasions.

Stratified Epithelium: Since the stratified epithelium is multi-layered, it helps in the protection of tissues below them.

Types

Simple Epithelium: Simple epithelium can be either squamous, columnar or cuboidal.

Stratified Epithelium: Stratified epithelium can be either squamous, columnar, cuboidal, or transitional.

Answer 2

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SIMPLE SQUAMOUS EPITHELIAL TISSUE:

➡️ the cells are fat and tile - like. nucleus is flattened , oval and is centrally located .

➡️ it is called as pavement tissue.

➡️ Location : the endothelium lining blood vessels and heart , mesothelium that lines bosy cavities, wall of Bowmans capsule of nephron , lining of alveoli of lungs.

STRATIFIED SQUAMOUS EPITHELIUM TISSUE:

this is found primarily in places subject to abrasion. cells of basal layer are usually cuboidal or columnar . as they move progressively closer to the , the cells become squamous. the superficial cells are sloughed off. it is of two types:

==> stratified squamous keratinized epithelium

==> stratified squamous Non keratinized epithelium.8

Location : Ducts of glands.