Ovarian follicle, light micrograph

Ovarian follicle, light micrograph

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Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Caption: Ovarian follicle. Coloured light micrograph of a section through a primary follicle in an ovary. At centre is the large nucleus of the developing egg (oocyte, pink). Surrounding the egg are cuboidal follicular cells (purple). At birth there are tens of thousands of primordial follicles, the precursors to primary follicles, present in the ovaries. Once sexual maturity is reached, up to 20 primordial follicles are triggered to start developing into primary follicles every menstrual cycle. Only one will reach full maturity and release its egg (ovum) at ovulation. Magnification: x500 when printed 10cm wide.

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Keywords: 1, anatomical, anatomy, biological, biology, cells, collagen, coloured, cross-section, cuboidal follicular cell, developing, egg, false-colour, false-coloured, female reproductive system, human body, light micrograph, light microscope, lm, maturing, nucleus, one, oocyte, ovarian, ovary, ovum, people, person, preantral, primary follicle, reproduction, section, slice, stroma, transverse

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