Preliminary observations on the ultrastructure of the human laryngeal glands: the secreting cells

The secretory portions of human laryngeal glands consist of seromucous and mucous cells. Seromucous cells contain granules either homogeneously dense or endowed with a bipartite structure, consisting of a clear peripheral halo and a central dense portion. In any case, however, they exhibit a morphological appearance different from that observed in seromucous granules of salivary glands. Mucous cells vary considerably according to the functional state.