Sea urchin fertilisation

Sea urchin fertilisation

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Caption: Sea urchin fertilisation. Differential interference contrast light micrograph of a sea urchin (Paracentrotus lividus) sperm cell (spermatozoon, small, left) in contact with the zona pellucida (outer membrane) of an egg cell (ovum) prior to entering and fertilising the ovum. Magnification: x220 when printed at 10 centimetres wide.

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Keywords: anatomical, anatomy, animal, animals, aquatic, biological, biology, blue, cell, cells, developing, development, developmental, dic, differential interference contrast, echinoderm, echinoidea, egg cell, fauna, fertilisation, invertebrate, invertebrates, light micrograph, light microscope, marine biology, nature, organism, ovum, paracentrotus lividus, purple sea urchin, reproduction, sea urchin, sequence, sperm cell, spermatozoon, surface, zona pellucida, zoological, zoology

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