TRANSPORT OF SPERMATOZOA
The newly formed spermatozoa are less motile, so the transportation of sperms to the epididymis occurs by the fluid of the seminiferous tubules and rete testis, as well as by the activity of contractile elements in the testis that direct fluid flow to the head of the epididymis.
The fertilizing ability of an animal is attained progressively during the transit of spermatozoa through the epididymis. Changes include the development of unidirectional motility, changes in nuclear chromatin (DNA-protein complex), and changes in the nature of the surface of the plasma membrane. The major site of sperm storage within the male reproductive tract is the tail of the epididymis. About 70% of the total number of spermatozoa are found in this region.
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