Anatomical features of cloacal region of male guinea fowl with special reference to the ejection of lymph-like fluid.

Cloacal region of male guinea fowl was investigated macro- and microscopically with special reference to the ejection of lymph-like fluid (LF) in the cloaca. In male guinea fowl, a negligible amount of LF was ejected at the time of ejaculation. LF was confirmed to be oozed out from the tissue near the papilla of the ductus deferens (TVP). Electrical cauterization of TVP led to a complete cessation of the ejection of LF. TVP was abundant in capillaries which were branched off from the A. pudenda interna at the site of paracloacal vascular body (PVB). Evans blue (T-1824) solution injected into the A. pudenda interna was easily exuded out directly from TVP. The dye solution introduced into PVB provoked the erection of the copulatory organ without oozing out from TVP. No ejection of LF from the tissues other than TVP in the cloaca was observed. These results showed that TVP was the tissue responsible for the ejection of LF in the cloaca of male guinea fowl.