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Home > All Images > 1994 > August > 8 Aug 1994

Images Dated 8th August 1994

Choose from 10 pictures in our Images Dated 8th August 1994 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.


Coloured SEM of sperm fertilising an egg Featured 8 Aug 1994 Print

Coloured SEM of sperm fertilising an egg

Coloured scanning electron micrograph of sperm (yellow) fertilising an egg cell (round and pink). At top centre three polar bodies (purple and blue) are seen. Before ovulation the egg cell (primary oocyte) ends its first meiotic division which gives rise to two cells known as the secondary oocyte and the first polar body. If after ovulation the secondary oocyte is penetrated by sperm, it completes the second meiotic division producing a fertilised oocyte and another polar body. The first polar body divides into two and all three polar bodies shortly degenerate. Magnification: x1530 at 6x7cm size

© PROF. P. MOTTA/DEPT. OF ANATOMY/UNIVERSITY LA SAPIENZA , ROME/SCIENCE PHOTO LIBRARY