when cih was used it is seen that the density of the negative charge is rather uniform within a particular segment of the spermatozoa and abruptly changes at the junction of morphologically distinct segments ( between the acrosomal and post acrosomal region of the sperm head and between the post acrosomal region and middle piece of the flagellum ) .
C0037868
spermatozoa
C0037844
of the sperm