Glandular Epithelium (OpenStax Anatomy and Physiology)
A gland is a structure made up of one or more cells modified to synthesize and secrete chemical substances. Most glands consist of groups of epithelial cells. A gland can be classified as an endocrine gland, a ductless gland that releases secretions directly into surrounding tissues and fluids (endo- = “inside”), or an exocrine gland whose secretions leave through a duct that opens directly, or indirectly, to the external environment (exo- = “outside”).
The secretions of endocrine glands are called hormones. Hormones are released into the interstitial fluid, diffused into the bloodstream, and delivered to targets, in other words, cells that have receptors to bind the hormones. The endocrine system is part of a major regulatory system coordinating the regulation and integration of body responses. A few examples of endocrine glands include the anterior pituitary, thymus, adrenal cortex, and gonads.
Exocrine glands release their contents through a duct that leads to the epithelial surface. Mucous, sweat, saliva, and breast milk are all examples of secretions from exocrine glands. They are all discharged through tubular ducts. Secretions into the lumen of the gastrointestinal tract, technically outside of the body, are of the exocrine category.
Betts, J. G., Young, K. A., Wise, J. A., Johnson, E., Poe, B., Kruse, D. H., … DeSaix, P. (n.d.). Anatomy and Physiology. Houston, Texas: OpenStax. Access for free at: https://openstax.org/details/books/anatomy-and-physiology
Other Related Research:
Research Article: Intracellular Propionibacterium acnes Infection in Glandular Epithelium and Stromal Macrophages of the Prostate with or without Cancer
Date Published: February 28, 2014 Publisher: Public Library of Science Author(s): Yuan Bae, Takashi Ito, Tadatsune Iida, Keisuke Uchida, Masaki Sekine, Yutaka Nakajima, Jiro Kumagai, Tetsuji Yokoyama, Hiroshi Kawachi, Takumi Akashi, Yoshinobu Eishi, Robert Hurst. http://doi.org/10.1371/journal.pone.0090324 Abstract: Recent reports on Propionibacterium acnes (P. acnes) suggest that this bacterium is prevalent in the prostate, is associated … Continue reading