<Tr> <Td> Holocrine--by membrane rupture </Td> </Tr> <P> Merocrine (or eccrine) is a term used to classify exocrine glands and their secretions in the study of histology . A cell is classified as merocrine if the secretions of that cell are excreted via exocytosis from secretory cells into an epithelial - walled duct or ducts and thence onto a bodily surface or into the lumen . </P> <P> Merocrine is the most common manner of secretion . The gland releases its product and no part of the gland is lost or damaged (compare holocrine and apocrine). </P> <P> The term eccrine is specifically used to designate merocrine secretions from sweat glands (eccrine sweat glands). </P>

Merocrine apocrine and holocrine are all examples of