Biology (NTSE/Olympiad)  

2. Tissue

Type of epithelial tissue

Type of epithelial tissue :
Squamous epithelium :
Simple squamous epithelial cells are extremely thin and flat and form a delicate lining. The oesophagus and the lining of the mouth are also covered with squamous epithelium.
The skin, which protects the body, is also made of squamous epithelium.
Cuboidal epithelium :
Structure. This epithelium consists of cube-like cells which are about as tall as wide. The outline of cells is polygonal in surface view and square in section.
Occurrence. The cuboidal epithelium lines the small salivary ducts, pancreatic ducts, sweat glands, salivary glands and thyrid glands. It also covers the ovaries and lines the sperm-producing tubules.
Function. It helps in protection , secretion, absorption, excretion and gamete formation.

Cuboidal epithelium (with cube-shaped cells) forms the lining of kidney tubules and ducts of salivary glands, where it provides mechanical support.

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