Abstract:The external insect chitinous skeleton is unable to respond to stimuli; the external signals are received by specialized receptors. Drosophila perceives the tactile stimuli by its external sensory organs, the microchaetes and macrochaetes residing on the head and back (notum). The microchaetes (hairs) are numerous and arranged in perfect rows along the body. The macrochaetes (bristles) are rather few and are strictly positioned on the head and notum, being referred to as bristle pattern. Bristles act as mechan… Show more
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