Maturing follicle

Maturing follicle

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Credit: INNERSPACE IMAGING/SCIENCE PHOTO LIBRARY

Caption: Maturing follicle. Light micrograph of a sectioned ovary showing a secondary follicle (large purple and white body, upper centre) maturing into an egg. 10-15 primordial follicles (small purple circles, lower frame) mature with each menstrual cycle. In the secondary follicle stage the chromosome-containing oocyte (purple circle, inside follicle) enlarges and is surrounded by many granulosa cells (dark purple dots). A large fluid-filled space (the antrum, white marbled with blue) also develops. One secondary follicle per month becomes a Graafian follicle, releasing its egg at ovulation. Trichrome stain. Magnification: x46 at 6x7cm size x23 at 35mm size.

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Keywords: anatomy, antral, antrum, cortex, female, fluid-filled, follicular cells, granulosa, healthy, human body, light micrograph, maturation, maturing, normal, ovary, primary oocyte, primordial follicles, reproduction, reproductive system, secondary, sectioned, trichrome stained

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