part of overlaps adult adult adipose system adult fat body Fat body of the adult. It is composed of diploid cells derived from cell clusters in the larval body wall and from adepithelial cells of the imaginal discs (Hoshizaki et al., 1995; Musselman and Kuhnlein, 2018). It is composed of various unconnected adipose tissue depots throughout the body (Musselman and Kuhnlein, 2018). fly_anatomy.ontology FBbt:00003209 fat body