Abstract
Summary
There is conflicting opinion concerning the motility of spermatozoa within the generative tract. It has been suggested that a high local tension of carbon dioxide prevents them from becoming motile in the epididymis and vas deferens. The carbon dioxide concentration of various tissues of the rat was studied and found even lower in the generative organs than in liver or skeletal muscle. Furthermore, the concentration of carbon dioxide found in the tissues of the generative tract was much lower than that which is required to immobilize spermatozoa in vitro.
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