Sponge spicule, SEM

Sponge spicule, SEM

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Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Caption: Sponge spicule. Coloured scanning electron micrograph (SEM) of a spicule from a sponge. Sponges are primitive aquatic organisms that filter food from the water. They are a loose aggregation of cells supported by spicules and needles composed of silica. This is a euaster form, where all extensions radiate outward from a central region (as opposed to having a branched structure).

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Keywords: 1, animal, aquatic, biological, biology, coloured, component, euaster, false-colour, false-coloured, fauna, invertebrate, invertebrates, marine, microbiological, microbiology, nature, one, porifera, poriferan, protection, protective, scanning electron micrograph, scanning electron microscope, sem, silica, siliceous, single, skeletal, skeleton, spicule, spicules, sponge, structural, support, supportive, unit, wildlife, zoological, zoology

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