Closeup of part of hypopharyngeal glands, note the central, unbranched, clear duct (running diagonally), with all the small globules attached. Secretion from each globule is transferred to the central duct, then to the mouth.
Description: Closeup of part of hypopharyngeal glands, note the central, unbranched, clear duct (running diagonally), with all the small globules attached. Secretion from each globule is transferred to the central duct, then to the mouth.