Question

Stratified epithelium is found in
A) Seminiferous tubules
B) Fellopian tube
C) Nasal cavity
D) Kidney tubules

Answer 1

Hint: Stratified epithelium is a type of tissue that is made up of more than one layer of epithelial cells. They are found in parts of pharynx, anus, eyes, uterus, urethra, vas deferens, lobur ducts of salivary glands.

Complete Answer:
- Stratified epithelium is responsible for protective or mechanical functions. It is bilayered or has more than 2 layers of epithelial cells in which the lower epithelium remains in contact with the basal lamina. It is also involved in secretions, regulation and absorption.
- The stratified epithelium can be classified into squamous, cuboidal or columnar based on the shape of the cells that makes them.
- They are mainly found in body surfaces, internal cavities of organs and tubes of glands.
Stratified squamous epithelium is found in the mouth of the nasal cavity and is confined to the nasal vestibule.
- In between the nasal squamous epithelium and the respiratory epithelium are layers of non ciliated cuboidal or columnar epithelium.
- The epithelium found in seminiferous tubules is specialised. It has a thick basal lamina surrounded by 3 to 4 layers of muscle cells. The inside of the tubules have specialised spermatogenic cells and sertoli cells that cumulatively form the seminiferous epithelium.
- The epithelium found in fallopian tubes is simple columnar epithelium. It is both ciliated and non ciliated.
- The kidney tubules are lined by simple cuboidal epithelium.

Hence the correct answer is option (C.) Nasal cavity.

Note: Epithelial tissues are found in all body organs. All hollow organs are surrounded by it.
- The Stratified epithelium covers only 12% of the nasal area in the rhesus monkey.
- It mainly functions as a protective epithelial layer for the underlying tissues from the harmful exposure to the atmospheric agents.