with the disappearance of the spermatozoa , a pas-positive material , which is believed to be secreted in the middle part of the head of the epididymal duct ( abe et al. , 1982 ) , was accumulated in the epididymal duct in the body and tail of the epididymis , and pas-positive inclusions appeared in the principal cells of the duct in the body 2 weeks after the first operation .
C1327616
secreted
C0007634
cells