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от Уикипедия, свободната енциклопедия

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Емблемата на Общомедия Този файл се намира в Общомедия — хранилището за свободно съдържание на Фондация Уикимедия.
Public domain This is a plate from Gray's Anatomy. Unless stated otherwise, it is from the online edition of the 20th U.S. edition of Gray's Anatomy of the Human Body, originally published in 1918.

Caption: Human ovum examined fresh in the liquor folliculi. (Waldeyer.) The zona pellucida is seen as a thick clear girdle surrounded by the cells of the corona radiata. The egg itself shows a central granular deutoplasmic area and a peripheral clear layer, and encloses the germinal vesicle, in which is seen the germinal spot.

This image in the public domain because its copyright has expired. This applies worldwide.

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