Breathing tube of fruit fly pupa

Breathing tube of fruit fly pupa

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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: x450 at 10x8 inch, x56 at 35mm size.

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Keywords: animal, breathing tube, drosophila melanogaster, fruit fly, insect, insect pupa, insecta, invertebrate, invertebrates, nature, pupa, respiration, scanning electron micrograph, sem, spiracle, spiracular papillary, wildlife, zoology

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