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* Epithelial Tissue: This tissue type forms the lining of organs and cavities, and also creates glands. Glandular epithelial cells are specialized to produce and secrete substances.
* Connective Tissue: While not the primary component of glands, connective tissue provides structural support and blood supply to the glandular tissue.
* Muscle Tissue: Some glands may contain a small amount of muscle tissue, particularly in glands with a contractile function.
* Nervous Tissue: Nervous tissue may be present in some glands to regulate secretion.
Types of Glands:
Glands are classified based on their structure and mode of secretion:
* Exocrine Glands: These glands secrete their products into ducts that carry them to a specific location, such as the surface of the skin or the lumen of an organ. Examples include sweat glands, salivary glands, and mammary glands.
* Endocrine Glands: These glands lack ducts and release their products directly into the bloodstream, where they act as hormones. Examples include the thyroid gland, pituitary gland, and adrenal glands.
In summary, glandular tissue is primarily made up of epithelial tissue , with some contributions from connective tissue , muscle tissue , and nervous tissue , depending on the specific gland.
