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copulation

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Copulation


Act of mating in animals with internal fertilization. Male mammals have a penis or other organ that is used to introduce spermatozoa into the reproductive tract of the female. Most birds transfer sperm by pressing their cloacas (the openings of their reproductive tracts) together.

© Research Machines plc 2008. All rights reserved. Helicon Publishing is a division of Research Machines plc.


 
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