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Which body part in the human body is composed of stratified squamous epithelium?
Oesophagus
Skin
Lining of the kidney tubules
Lining of the intestine
Skin
Stratified squamous epithelium is a type of tissue characterized by multiple layers of cells, with the outermost layer being flat (squamous) in shape. It is primarily designed to provide protection against abrasion and physical stress in areas of the body subject to significant wear and tear.
Stratified squamous epithelium is a type of tissue characterized by multiple layers of cells, with the outermost layer being flat (squamous) in shape. It is primarily designed to provide protection against abrasion and physical stress in areas of the body subject to significant wear and tear.
Think of it like the multiple layers of a heavy-duty conveyor belt or multiple sheets of protective film layered on a screen, where the outer sheet can wear out while the inner layers maintain structural integrity.
SS-P: Stratified Squamous = Protection (by sloughing layers).
This epithelium acts as a physical barrier. The stratified (multi-layered) arrangement ensures that even if surface cells are sloughed off due to mechanical friction (as seen during the passage of food), the underlying tissue remains protected and can regenerate from the basal layer.
It consists of multiple layers of cells.
The apical cells are flattened or squamous in shape.
It is found in high-friction areas such as the oesophagus, mouth cavity, and skin (keratinized).
Non-keratinized stratified squamous epithelium lines the moist surfaces like the oesophagus.
Superior protection against mechanical abrasion.
Rapid cell turnover allows for effective repair of damaged surfaces.
Lining of the oesophagus
Oral cavity (mouth)
Vagina
Epidermis of the skin
The lining of kidney tubules is made of simple cuboidal epithelium for reabsorption and secretion.
The lining of the intestine is typically simple columnar epithelium to facilitate absorption and secretion.
B is correct тАФ The oesophagus is lined with non-keratinized stratified squamous epithelium to withstand the mechanical stress of swallowing food.
Remember that simple epithelium is for absorption/secretion (e.g., kidney, intestine), whereas stratified epithelium is primarily for protection against friction.
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