The sperm of Amphibia find their way relatively easily to the outside. First, fine tubules connected directly to the testes (T) (Fig. 2) lead through a part of the kidney reserved for the passage of sperm. Then the sperm duct (S = Wolffian duct) takes the sperm and leads them to the cloaca (Cl) and urinary bladder (UB) whence they can reach the outside. The eggs, in comparison, must complete a much more eventful and obstacle-ridden course within the body of the mother.


Fine Tubule Sperm Duct Wolffian Duct Vitelline Membrane Jelly Coat 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 1974

Authors and Affiliations

  • Ernst Hadorn
    • 1
  1. 1.Zoologisch-Vergl., Anatomisches InstitutUniversität ZürichZurichSwitzerland

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