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Fig. 1. The cricket cercal system. (A) Acheta domestica. The cerci are the
two antenna-like structures, covered with fine hairs, extending from the rear
of the abdomen. This is a female: the ovipositor can be distinguished between
the two cerci. (B) Scanning electron microscope close-up of a segment of the
cercus. The cercus is approximately 1 cm in length. (C) Computer
reconstructions of a primary sensory interneuron (blue) and three primary
sensory afferents (red, light blue and brown) in their correct anatomical
relationships. These cells were stained in different animals and the
reconstructions were scaled and aligned to a common coordinate system. Scale:
40 µm between tick marks on the scale bars. The inset shows a cartoon of a
cut-away view of the cricket nervous system. The terminal abdominal ganglion,
where the sensory neurons and interneurons are located, is indicated with a
red arrow.
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