functionally, trophocytes are store houses of food material. Fat is the chief component. Glycogenand protein also are stored in them. Protein storage is marked in animals which hibernate. Nearly 33% of the weight of a mature Apis larva is due to trophocytes. They reserves in trophocytes are drawn up under conditions of starvation or inactivity.
They contribute also to the development of rggs. The presence of lipase in fat droplets within cells indicate thet hydrolysis into fatty acids and glycerol also occurs within this organ. They then get transported to respiring tissues for utilisation.