blad'der

Any thin-walled sac capable of inflation or having the appearance of being inflated. Used alone, the word is usually understood to denote the urinary b. caudal b. The vesicular portion of a Cysticercus. daughter b's. Secondary hydatids; cysts arising from the outer or inner surface of the mother b. and giving origin in their interior to heads, brood capsules, or granddaughter b's. gall-b. An egg-shaped or pear-shaped sac, about four inches long, in the human subject, situated in a fo a on the lower surface of the liver, to which it is attached; it serves as a receptacle for the bile, to which it adds a mucous secretion of its own, and then discharges it into the duct us choledochus communis, granddaughter b's. Hydatid cysts, springing from daughter b's. mother b. A hydatid cyst from the inner or outer surface of which spring secondary cysts, urinary b. A hollow muscular organ serving as a reservoir for the urine; situated in the pelvis between the pubic bones in front and the rectum (or, in women, the uterus) behind. During fetal and infantile life it lies mainly above the pubes. It is flattened and more or le horizontal when empty, but when distended it becomes an oval bag and rises towards the hypogastrium. It has a muscular wall, lined with mucous membrane and covered, except in its lower portion, with a loosely attached peritoneal coat. Into its lower and posterior portion the ureters empty and from its neck the urethra arises. When not over distended, it holds about 8 ounces. [Ang.-Sax., blaedre.']