overlaps adult adult specialized Malpighian tubule cell adult Malpighian tubule tip cell FBbt:00005734 fly_anatomy.ontology Tip cell of the adult Malpighian tubule. The tip cell of the adult anterior tubules makes contact with alary muscles of the heart, whereas the tip cell of the posterior tubules contacts the a9 hindgut visceral nerve on the surface of the hindgut. Malpighian tubule tip cell