Lining of Parotid Gland

The correct answer is option 'B', which is stratified cuboidal epithelium. The parotid gland is one of the major salivary glands located in front of the ear and secretes saliva into the oral cavity. The lining of the parotid gland consists of stratified cuboidal epithelium, which is a specific type of epithelial tissue.

Epithelial Tissue
Epithelial tissue is one of the four main types of tissues in the human body. It covers the external surface of the body, lines various body cavities, and forms the secretory portions of glands. Epithelial tissues are classified based on their shape and arrangement of cells.

Stratified Cuboidal Epithelium
Stratified cuboidal epithelium consists of multiple layers of cube-shaped cells. It is characterized by the presence of two or more layers of cells, with the cube-shaped cells present in the superficial layers. This type of epithelium is typically found in glandular tissue, where it provides protection and secretion.

Function of Stratified Cuboidal Epithelium in the Parotid Gland
The parotid gland is responsible for producing saliva, which aids in the process of digestion. The stratified cuboidal epithelium lining of the parotid gland plays a crucial role in this function.

- Protection: The multiple layers of cells in stratified cuboidal epithelium provide protection to the underlying tissues of the parotid gland. It acts as a barrier against mechanical damage, bacterial invasion, and chemical irritation.

- Secretion: The cuboidal cells in the superficial layers of the epithelium are involved in the secretion of saliva. These cells possess specialized structures called acini that produce and release saliva into the ducts of the parotid gland.

- Absorption: The stratified cuboidal epithelium lining of the parotid gland also facilitates the absorption of certain substances from the saliva. This process helps in maintaining the balance of electrolytes and other solutes in the saliva.

- Barrier Function: The stratified nature of the epithelium adds an extra layer of protection, preventing the passage of harmful substances from the oral cavity into the underlying tissues of the parotid gland.

In conclusion, the lining of the parotid gland is composed of stratified cuboidal epithelium, which provides protection, secretion, absorption, and acts as a barrier. This specific type of epithelium is well-suited for the functions of the parotid gland, including the production and release of saliva.

Stratified columnar epithelia are found in the largest excretory ducts of some glands. The parotid gland, a large salivary gland, is one of them. ... These ducts finally coalesce to form the main excretory duct of the parotid which is lined by a stratified columnar epithelium.