Natural sponge, SEM

Natural sponge, SEM

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Credit: POWER AND SYRED/SCIENCE PHOTO LIBRARY

Caption: Natural sponge. Coloured scanning electron micrograph (SEM) showing the branching structure of the body of a natural sponge (phylum porifera). Sponges are primitive aquatic animals that filter food from the water. Their bodies are supported by an internal skeleton of calcium or silicon based spicules (spines), and fibres of the protein spongin. Magnification: x62 when printed 10 centimetres wide.

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Keywords: animal, aquatic, biological, biology, body, body structure, branching, calcareous, calciferous, calcium, coloured, false-coloured, fauna, fibre, fibres, filter feeder, invertebrate, invertebrates, marine, marine biology, natural sponge, nature, porifera, poriferan, primitive organism, scanning electron micrograph, scanning electron microscope, sem, sessile, siliceous, silicon based, spicule, spicules, sponge, spongin, wildlife, zoological, zoology

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