obsolete_hatching gland true 2.38 A transversely oriented set of cells located deep to the enveloping layer on the pericardial membrane, especially prominent during pharyngula period because of the brightly refractile cytoplasmic granules (containing hatching enzymes) of the principal cells of the gland; The fish hatching gland is a unicellular holocrine gland. Although it has recently been found that the precursors or immature forms of the gland cells considerably migrate in the embryonic body during development (see later), the final location of the hatching gland cells in fish is generally restricted to anterior and/or dorsal regions of a well-grown prehatching embryo. In medaka, the final location is somewhat unique: The giant gland cells are mostly localized in the inner surface of the buccal (or pharyngeal) cavity. true Use http://purl.obolibrary.org/obo/UBERON_0002538 label: hatching gland MAT:0000180 http://purl.obolibrary.org/obo/UBERON_0002538 TAO:0000026 BTO:0000558 A transversely oriented set of cells located deep to the EVL on the pericardial membrane, especially prominent during pharyngula period because of the brightly refractile cytoplasmic granules (containing hatching enzymes) of the principal cells of the gland. Kimmel et al, 1995. A transversely oriented set of cells located deep to the EVL on the pericardial membrane, especially prominent during pharyngula period because of the brightly refractile cytoplasmic granules (containing hatching enzymes) of the principal cells of the gland. ZFA:0000026 hgg James Malone