| The proximal portions of the male bird reproductive system is quite similar to mammals. It consists of testes containing seminferous tubules which produce sperm with the help of interstitial and sertoli cells. The spermatozoa travel via efferent ductules to the epididymis,and then on to the ductus deferens. The bird is different from most mammals in that the testes are located in the abdominal cavity (and therefore subject to the high body temperature of birds). In addition, the bird lacks a penis; the ductus deferens deliver sperm to the cloaca, which are transfered to the vagina during mating. |
