Male seaweed receptacle

Male seaweed receptacle

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: Male seaweed receptacle. Light micrograph of a section through a receptacle from male serrated wrack (Fucus serratus) brown algae, showing the conceptacles (round) containing the male reproductive organs (antheridia, dark spots). The interior of the conceptacles is lined with hairs (paraphyses), the tips of which bear the antheridia. These male reproductive structures are released through the ostiole (hole at top of conceptacle, upper centre) to the sea, where they are chemotactically attracted to the conceptacles of female seaweeds to fertilise the ova (female reproductive cells). Magnification: x13 when printed 10 centimetres wide.

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Keywords: alga, algal, anatomical, anatomy, antheridia, antheridium, biological, biology, botanical, botany, brown algae, cell, cells, chromatophore, chromatophores, conceptacle, cortex, flora, fucus serratus, gamete, gametes, hair, hairs, histological, histology, light micrograph, light microscope, male, marine, meristoderm, nature, no-one, nobody, organs, ostiole, ostioles, paraphyses, parenchyma, part, parts, plant, plants, reproductive structure, seaweed, section, sectioned, serrated wrack, sex organ, structures, toothed wrack, white background, wildlife

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