PROF. P. MOTTA / DEPT. OF ANATOMY / UNIVERSITY LA SAPIENZA, ROME / SCIENCE PHOTO LIBRARY PROF. P. MOTTA / DEPT. OF ANATOMY / UNIVERSITY LA SAPIENZA, ROME / SCIENCE PHOTO LIBRARY
Ovulation. Coloured scanning electron micrograph of the ovulation process. The egg (red at centre) has ruptured the external surface of the ovary (dark green), known as the germinal epithelium, and has started its journey through the Fallopian tube towards the uterus. The image clearly shows the thick glycoprotein layer (red), the zona pellucida, which entirely surrounds the egg. The egg is also partly surrounded by cells (granulosa cells light green) and fluid (liquor folliculi yellow), which formerly provided nutrients and protection to the egg in the ovary. Magnification: x1850 at 6x7cm size.
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