Ovarian follicle. Coloured scanning electron micrograph (SEM) of a secondary follicle in the ovary. The follicular cavity,which holds the developing egg (not seen),is at centre (brown) and is surrounded by cuboidal follicular cells (orange). 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 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Gschmeissner, Steve |
Bildgröße: | 4000 px × 3011 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |