Which type of epithelial tissue is involved with secretion?

Glandular epithelial tissue is primarily involved in secretion. This type of tissue is specialized for the production and release of substances such as hormones, enzymes, mucus, and other bodily fluids. Glandular epithelium forms the functional parts of glands, which can be either endocrine (releasing substances directly into the bloodstream) or exocrine (secreting substances through ducts to external surfaces or into cavities).

Other types of epithelial tissue, such as simple stratified, squamous, and cuboidal, have different primary functions. For example, squamous epithelial tissue is involved in absorption and filtration due to its thin and permeable structure, while cuboidal epithelial tissue mainly participates in secretion and absorption but is less specialized than glandular epithelium for the purpose of secretion. The specific structural adaptations of glandular epithelial cells, such as increased Golgi apparatus and rough endoplasmic reticulum, further support their role in the synthesis and secretion of various products.