prolapse itself means: The falling down or slipping out of place of an organ or part such as: Uterine prolapse is a descent or herniation of the uterus into or beyond the vagina (i believe this is it's most common usage- especially if it was a breeder speeking about a breeding bitch) or eyeball prolapse where the eye pops out of socket
Prolapsed what? rectum or uterus? basically in a rectal prolapse the colon comes out the anal opening and needs to be put back in. same with a uterine prolapse the uterus comes out the vaginal opening. this is much more serious than a rectal prolapse and cannot always be fixed. you see rectal prolapses alot with little kittens who have severe diarhhea.