Ovarian primordial follicles,micrograph

Numéro d’image : 11647347
Ovarian primordial follicles,micrograph
Ovarian primordial follicles. Light micrograph of a section through the cortex of a neonatal ovary,showing clusters of primordial follicles each containing a single oocyte (egg cell) surrounded by a layer of follicle,or granulose,cells. The oocytes are the female germline cells. At birth in humans there may be up to one million primordial follicles in a pair of ovaries. Primordial follicles remain arrested in development until activated to enter a prolonged growth and maturation phase called folliculogenesis. In postnatal and early adult life perhaps 10-20 primordial follicles are recruited each day to enter the follicular growth process resulting in the gradual decline in their number such that at menopause,only a few hundred remain. Magnification:
Licence : Droits gérés
Crédit: Science Photo Library / Microscape
Taille de l’image : 5135 px × 3402 px
Model Release : Non requis
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