Segmentation of Drosophila organs. (A,B) Overview of the entire fly, illustrating major components of the nervous system, the intestinal tract, and the musculature. (C,D) Detail of the flight musculature. DLM, dorsal longitudinal muscles (dark-blue); DVM-I/II/III, dorsal–ventral muscles (blue); DFM49–DFM54, direct flight muscles (yellow); TDT, tergal depressor of the trochanter (light-blue). (E-F) Detail of the CNS and the intestinal system. Brain (dark green), CN, cervical connective (green); ThAGl, thoracico-abdominal ganglion, (light-green); CB, cibarium (light-rose); ES, oesophagus (rose); PV, proventriculus (red); SGs, pair of salivary glands (brown); CR, crop (orange). Length of scale bar 200 μm.