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Updated: June 20, 2025
These are generally developed in one sex and rudimentary in the other. Thus the spermaducts are formed from the Wolffian ducts in the male, whereas in the female we have merely rudimentary traces of them in Gaertner's canals. Again, the male has in his nipples and mammary glands the rudiments of organs that are usually active only in the female.
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