Epithelial Tissue: Glandular Epithelium Classification

Study Notes

Defining Characteristics of Glandular Epithelium

Composed of specialized cells that produce and secrete various substances such as hormones, enzymes, and mucus.

Differences Between Exocrine and Endocrine Glands

Exocrine glands secrete products through ducts to the surface or cavity (e.g., sweat glands, salivary glands).
Endocrine glands release hormones directly into the bloodstream, allowing for systemic distribution (e.g., thyroid, adrenal glands).

Ductless Exocrine Gland

Goblet cells are a type of exocrine gland that does not have a duct and secretes mucus directly onto the free surface.

Simple vs. Compound Exocrine Glands

Simple exocrine glands consist of a single duct and are unbranched (e.g., simple tubular glands).
Compound exocrine glands have multiple ducts and branched structures (e.g., compound acinar glands).

Methods of Secretion in Exocrine Glands

Exocrine glands utilize methods such as merocrine (exocytosis), apocrine (partial loss of the cell), and holocrine (complete cell disintegration) for secretion.
Not all glands use the same method; for example, some do not utilize apocrine secretion.

Features of Multicellular Exocrine Glands

Comprised of multiple cells forming a structure with either a simple or branched duct system, allowing for more complex secretory functions.

Common Unicellular Exocrine Gland

Goblet cells are the most common unicellular exocrine glands, primarily found in the respiratory and intestinal tracts.

Shared Characteristic of Simple and Compound Exocrine Glands

Both types have the primary function of secreting substances to specific sites, aiding in processes like digestion and lubrication.

Description

This quiz covers the definition of glandular epithelium, its classification, and the classification of exocrine glands. Learn about the specialized group of cells that synthesize and secrete substances or hormones and understand how these glands develop from epithelial tissue.