Question

Compound squamous epithelium is found in
(a) Stomach
(b) Intestine
(c) Trachea
(d) Pharynx

Answer 1

Hint: This body organ is lined by a non keratinised Compound squamous epithelium which is a muscular tube that runs from the back of your nose down into your neck. The compound epithelium consists of more than one layer of cells. It covers the internal or external surfaces of the body.

Complete answer:
Compound squamous epithelium is found in pharynx. It is present in the epidermis of the skin of land vertebrates, oral cavity, tongue, oesophagus, anal canal, lower parts of the urethra, vocal cords, vagina, cervix, conjunctiva, the inner surface of eyelids and cornea of the eye. In the stomach and intestine, the simple columnar epithelium is present. While in trachea pseudostratified columnar ciliated epithelium occurs.
- Epithelial tissue is a tissue system in animals that forms the outer layer of body surfaces, the lining of the alimentary canal, and the walls of hollow structures.
- Compound epithelium may be stratified or transitional.
- Stratified epithelia have many layers and the deepest one is of cuboidal cells.
- The morphology of the superficial layers varies in the different kinds of stratified epithelia.
- The pharynx has various superficial layers of living squamous cells and deeper layer of interlinked polygonal cells.so the pharynx has stratified non- keratinized squamous epithelial cells that cover the moist surfaces of those of buccal cavity, pharynx, and oesophagus.
So the correct answer is Pharynx.

Note:
- Only the cells of the deepest layer of compound epithelium rest on the basement membrane. As they are multilayered, so there is a little role in secretion or absorption, but they provide protection to underlying tissues.
- The pharynx is part of the digestive system. It makes up the part of the throat situated immediately posterior to the nasal cavity, posterior to the mouth and superior to the oesophagus and larynx.