31. "' Urogenital closure "'closure of any midline opening at the base of the penis. 32. The urethra typically opens into a common channel with the vagina ( i . e . urogenital sinus ). 33. Additionally, candidate genetic pathways would be expected to involve genes expressed in the developing urogenital system ( UGS ). 34. In addition to the other organs, it is possible " Ottoia " contained urogenital organs in its trunk. 35. The remainder of this part of the urogenital sinus forms the body of the bladder and part of the prostatic urethra. 36. Trichodinids are typically found on the gills, skin and fins of fishes, though some species parasitise the urogenital system. 37. A gonadal tissue neoplasm should not be confused with a urogenital neoplasm, though the two topics are often studied together. 38. The disinfected skin surface gets recolonized from bacteria residing in the deeper areas of the hair follicle, gut and urogenital openings. 39. After the separation of the rectum from the dorsal part of the cloaca, the ventral part becomes the primary urogenital sinus. 40. The urogenital sinus, in turn, divides into the superficial definitive urogenital sinus and the deeper anterior vesico-urethral portion.
