SEM of breathing tube of fruit fly, Drosophila

SEM of breathing tube of fruit fly, Drosophila

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Caption: Scanning electron micrograph of an anterior spiracle, or breathing tube, one of a pair, on the shed pupal casing of a fruit fly Drosophila melanogaster (wild type Oregon R). They project outward from the puparium, the outer grooved surface of which is seen in the background. This anterior spiracle terminates in tubelike extensions, called spiracular papillae (seen here). The tips of these open in narrow slits, which take in air & pass it to the developing pupa. They air is circulated through the thick tracheal tube or pipe lying on the inner surface of the puparium. Magnification X420 (at 10x8 size).

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Keywords: animal, drosophila melanogaster, fruit fly, insect, insect pupa, insecta, invertebrate, invertebrates, nature, pupa, respiration, spiracle, spiracular papillary, wildlife, zoology

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