Figure 5: ( a ) Histological section of the scrotal cauda epididymidis of a rat. ( b ) A comparable section of the ipsilateral cauda reflected the abdomen 3 months previously. In ( b ) the diameter and length of the distal segment are reduced. Note that the epididymis in ( b ) remained in continuity with a normal scrotal testis, and had a normal sperm number in the caput. C: The lower region of the corpus epididymidis. V: the vas deferens.