Outer coarse fibers of the mammalian sperm tail— an electron microscope study

Abstract

This paper describes comparative fine structure of the human, rat, and rabbit sperm tail with particular reference to the coarse fibers. Some of the sections of the human sperm tail reveal a variable number of supernumerary coarse fibers in addition to the usual number of nine. In the rabbit, some of the coarse fibers seem to be connected with each other by short processes. In the three species under consideration, certain differences in the composition of the coarse fibers have been noticed.