Epithelial Tissue: Exocrine Glands

by Geoffrey Meyer, PhD

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    In this lecture, I am going to provide an overview of the structure of exocrine glands in the body and some indication of the function of these glands. And I am also going to deal with in more detail where appropriate when I review the organ systems in the later lectures. Exocrine glands are very important in a number of different organ systems and it's important that first of all you understand what a gland is and know that basically these glands form two major categories. They are the serous secreting or mucous secreting. You need to also understand the way in which glands secrete the components that they have made and how we classify glands or name them. And most importantly also it is important to have some understanding of the duct system of these glands because these ducts within some glands modify the secretion product produced via the secretory cells. Now, there are a number of different types of glands. As I explained I am mainly going to concentrate in today's lecture on the exocrine glands. They are glands that synthesize, then secrete their products onto the surface. They do so either directly such as we see in goblet cells lining some epithelia or they secrete their product via a tube called the duct or a conduit. And as I mentioned earlier, some of these ducts modify the secretion of the glands. There are also endocrine glands. These are glands that synthesize their products, but then they secrete them into the extracellular space around the glands. Because during development, when the epithelium invaginated into underlying connective tissue, the connection between the surface of the epithelium and the secretory invaginated epithelial cells is lost. And so there is no way for these glands to secrete their products. So therefore,...

    About the Lecture

    The lecture Epithelial Tissue: Exocrine Glands by Geoffrey Meyer, PhD is from the course Epithelial Tissue. It contains the following chapters:

    • Exocrine glands
    • How do exocrine glands release their secretory products?
    • How are exocrine glands classified/named?
    • Mucous and serous glands
    • Lobes, lobules and cytogenesis
    • Names of ducts of glands
    • Mucosa and serosa

    Included Quiz Questions

    1. Often deliver their secretion products to target cells via a duct.
    2. Mostly secrete products that directly affect adjacent epithelial cells.
    3. Only secrete mucus.
    4. Secrete their products into the extracellular space.
    5. Effect target tissues via transport of their secretion products by the bloodstream.
    1. Have short functionally significant intercalated ducts
    2. Secrete proteins
    3. Have substantial striated ducts
    4. Contain secretory cells with apical secretory granules that stain “eosinophilic”
    5. Secrete using a “merocrine” secretory mechanism
    1. Lines cavities connected to the outside of the body
    2. Lines closed cavities of the body
    3. Has a mesothelium
    4. Lines the pleural and pericardial cavity
    5. Is a special epithelium that lacks a basement membrane

    Author of lecture Epithelial Tissue: Exocrine Glands

     Geoffrey Meyer, PhD

    Geoffrey Meyer, PhD

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