Coiled tubular gland

Coiled Tubular Gland

A coiled tubular gland is a type of exocrine gland found in various parts of the human body. These glands are characterized by their coiled tubular structure, which plays a crucial role in their function of secreting substances directly into the external environment or onto body surfaces. Coiled tubular glands are involved in a wide range of physiological processes, including sweat production, saliva secretion, and the release of digestive enzymes.

Structure

The structure of a coiled tubular gland consists of a long, coiled tube that is lined with epithelial cells. These cells are responsible for the production and secretion of substances. The gland is divided into two main parts: the secretory portion, which is the coiled part where the secretion is produced, and the duct, which is the tube through which the secretion is expelled. The secretory portion is often surrounded by myoepithelial cells, which help expel the secretion by contracting.

Function

The primary function of coiled tubular glands is to produce and secrete various substances essential for the body. The specific function depends on the gland's location and the type of secretion it produces. For example, sweat glands are coiled tubular glands that play a key role in thermoregulation by secreting sweat, which cools the body when it evaporates. Similarly, salivary glands secrete saliva, which aids in digestion and keeps the mouth moist.

Types

There are several types of coiled tubular glands, each serving a different function:

• Eccrine sweat glands: These glands are responsible for the production of sweat, which helps regulate body temperature.
• Apocrine sweat glands: Found mainly in the underarm and genital areas, these glands secrete a thicker fluid that is involved in scent and pheromone release.
• Sebaceous glands: These glands secrete sebum, an oily substance that helps lubricate and protect the skin.
• Salivary glands: These glands produce saliva, which begins the process of digestion and helps maintain oral hygiene.

Clinical Significance

Coiled tubular glands can be involved in various medical conditions. For example, hyperhidrosis is a condition characterized by excessive sweating, often due to overactive eccrine sweat glands. Acne is another common condition that involves the blockage and inflammation of sebaceous glands.

See Also

• Exocrine gland
• Sweat gland
• Salivary gland
• Sebaceous gland