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Home > All Images > 1997 > August > 26 Aug 1997

Images Dated 26th August 1997

Choose from 17 pictures in our Images Dated 26th August 1997 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.


Coloured SEM of sperm on egg during fertilisation Featured 26 Aug 1997 Image

Coloured SEM of sperm on egg during fertilisation

Fertilisation. Coloured scanning electron micro- graph (SEM) of sperm on the surface of a human egg (ovum) during fertilisation. The egg has a spongy protective surface. Sperm are seen attached to it and appear as hair-like structures; each sperm has a head, neck, and a long tail. Here the sperm are attempting to penetrate the thick surface of the egg that attracts them and enables them to attach. The human female usually produces a single large egg, and only one of the millions of male sperm released may penetrate the egg to fuse with the egg nucleus. Once fertilised, the egg begins its process of growth into a human embryo. Magnification: x670 at 6x7cm size. Mag; x635 at original 6x7cm size

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