part_of adult body adult fat body Fig. 13-1, Fig. 13-2, Fig. 13-3, Fig. 13-4, Fig. 13-5, Fig. 13-6, in Biology of Ticks ISBN:0-19-505910-7. TADS:0000321 TADS:0000321 The fat body consists of highly dispersed strands of cells clinging to the atrial chamber, tracheal trunks and trachea and, to a limited extent, other internal organs. The fat body is the site of synthesis for vitellogenin, the yolk protein, of conversion o fecdysone into 20-hydroxyecdysone (the molting hormone and other hormonal functions) and probably other functions. It is also believedto be site for the production of antimicrobial proteins, e.g., defensin. The fat body subdivided into central region, surrounding thealimentary canal and a peripheral region, along the tracheal trunks and tracheae. The fat body consists of two types of cells,trophocytes and nephrocytes. default_namespace portion of tissue