Coloured SEM of an earthworm, Lumbricus t

Coloured SEM of an earthworm, Lumbricus t

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Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Caption: Common earthworm. Coloured scanning electron micrograph (SEM) of the rear end of a common earthworm (Lumbricus terrestris). The anus (light brown) is found on the earthworm's last segment (pygidium). Also visible are the chaetae, tiny thorn-like projections which are used for movement. Adult earthworms can grow up to 30cm in length. Their diet consists of organic substances in the soil. They aid the regeneration of mineral supplies, and their movement helps to break up the soil and improve aeration. They are thus vital to the regeneration of arable soils. Magnification unknown.

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Keywords: animal, annelid worm, annelida, anus, chaetae, common, common earthworm, earthworm, invertebrate, invertebrates, lumbricus terrestris, nature, pygidium, wildlife, worm, zoology

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