The goblet cell is classified as which type of gland?

The goblet cell is classified as a unicellular exocrine gland due to its structure and function. Goblet cells are specialized epithelial cells found in various mucosal surfaces, such as the respiratory and gastrointestinal tracts. They produce and secrete mucus, which plays a critical role in lubrication and protection of the epithelial lining.

Being unicellular means that each goblet cell functions independently rather than as part of a larger glandular structure. This individual action is characteristic of unicellular glands, in contrast to multicellular glands, which comprise groups of cells and often have a more complex arrangement and ductal system.

Furthermore, goblet cells are categorized as exocrine glands because they release their secretions (mucus) onto epithelial surfaces rather than directly into the bloodstream, which is a defining feature of endocrine glands. The secretion through an epithelial surface is indicative of exocrine function, further validating why the goblet cell fits the classification of a unicellular exocrine gland.