Simple tubular gland

Simple Tubular Gland

A simple tubular gland is a type of exocrine gland found in various parts of the human body. It is characterized by its simple, unbranched tubular structure. These glands play a crucial role in the secretion of substances necessary for bodily functions. The structure and function of simple tubular glands can vary depending on their location within the body.

Structure

The simple tubular gland consists of a single, unbranched tube. The gland is lined with epithelial cells that are responsible for the production and secretion of substances. The base of the gland is typically connected to a duct or directly to the surface of an organ, where the secreted substance is expelled. The simplicity of its structure allows for efficient secretion of materials directly to the required site.

Function

The primary function of simple tubular glands is the secretion of various substances, including mucus, enzymes, and other essential compounds. These secretions play vital roles in digestion, lubrication, and protection of mucosal surfaces against pathogens. The specific function of a simple tubular gland depends on its location and the type of cells that line the gland.

Locations and Examples

Simple tubular glands are found in several locations throughout the body, including:

• Stomach: Gastric glands that secrete gastric juice, which contains hydrochloric acid and digestive enzymes.
• Intestine: Intestinal glands (Crypts of Lieberkühn) that produce digestive enzymes and mucus to aid in the digestion and absorption of nutrients.
• Skin: Sweat glands that are involved in thermoregulation and excretion.
• Uterus: Endometrial glands that secrete substances essential for the maintenance of the uterine lining and embryo implantation.

Clinical Significance

Alterations in the structure or function of simple tubular glands can lead to various diseases and conditions. For example, blockage of these glands can result in cyst formation or infections. Additionally, abnormal cell growth within these glands can lead to the development of tumors, which may be benign or malignant.

See Also

• Exocrine gland
• Gland
• Epithelial cell
• Secretion