Graafian follicle in ovary. Light micrograph of a section through a Graafian follicle in the human ovary. The Graafian follicle develops at monthly intervals in fertile,non-pregnant women. It contains the almost mature oocyte or egg (round at centre). Around the oocyte (pale,irregular) is the follicular antrum containing an accumulation of follicular fluid. Forming a layer of even thickness around the periphery of the follicle is the zona granulosa (purple dots). To the outside of this layer are the oestrogen-secreting theca interna and theca externa. Rupture of the Graafian follicle releases the oocyte (ovulation). Magnification: x200 at 35mm size | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Science Pictures |
Bildgröße: | 4957 px × 3316 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |