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Ovarian follicle

Ovarian follicle

P616/0314

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Credit

INNERSPACE IMAGING / SCIENCE PHOTO LIBRARY INNERSPACE IMAGING / SCIENCE PHOTO LIBRARY

Caption

Ovarian follicle. Light micrograph of a sectioned ovary showing a primary follicle (large pink and purple circle). Within the follicle is the primary oocyte (smaller circle, centre) which contains the chromosomes (not seen). This is surrounded by several layers of granulosa cells (pink and purple, outer circle) which secrete glycoproteins. These form the zona pellucida (blue) which separates the oocyte from the granulosae and is penetrated by the sperm at fertilization. Several follicles mature with every ovarian cycle, but only one becomes a Graafian follicle, releasing its oocyte at ovulation. Toluidine blue stain. Magnification: x80 at 35mm size.

Release details

Model release not required. Property release not required.

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