The Great Sperm Race!
Feb. 1st, 2013 05:18 pm![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
wispfoxhttps://www.youtube.com/watch?v=4SFOpHiS-tA
The process the sperm go through to fertilize an egg, human-sized!
The process the sperm go through to fertilize an egg, human-sized!
wispfoxwispfox
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Date: 2013-02-01 11:42 pm (UTC)