Ovarian follicule maturation

Référence de la vidéo 11937617
Ovarian follicule maturation. Animation showing the stages in the maturation and release of an a female reproductive cell (ovum, egg) during oogenesis and ovulation. The first sequence shows three steps in the development and formation of the zona pellucida produced by the primary oocyte as well as the proliferation of follicular cells. These structures are enveloped by a basal lamina, itself covered by cells of the theca of the follicle (theca interna and theca externa). The second animation sequence shows blood vessels and the progressive formation of a cavity called the antrum (formed by the merging of smaller cavities that appeared earlier). By this time, the oocyte has moved near the basal lamina from which it is only separated by a clump of follicular cells named the cumulus oophorus. The oocyte is enveloped by a crown of follicular cells named the corona radiata. The final stage shows the proliferation of blood vessels in the theca and finally the rupture of the follicle and the release of the maturing oocyte (a secondary oocyte) for potential fertilisation. For this animation without labels, see K004/3326.
Licence : Droits gérés
Crédit : Science Photo Library / Biocosmos / Francis Leroy & Marie Martinache
Model Release : Non requis
Durée : 32 Secondes
Aspect ratio : 16/9
Restrictions : -

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