Henry Gray (18251861). Anatomy of the Human Body. 1918.
part of the abdominal wall which lies between the symphysis pubis and the umbilicus (Symington1). Its fundus is clothed with peritoneum as far as the level of the internal orifice of the urethra. Although the bladder of the infant is usually described as an abdominal organ, Symington has pointed out that only about one-half of it lies above the plane of the superior aperture of the pelvis. Disse maintains that the internal urethral orifice sinks rapidly during the first years, and then more slowly until the ninth year, after which it remains sta when it again slowly descends and reaches its adult position.
FIG. 1137 Sagittal section through the pelvis of a newly born male child. (See enlarged image)
FIG. 1138 Sagittal section through the pelvis of a newly born female child. (See enlarged image)
The Female Bladder (Fig. 1139).In the female, the bladder is in relation behind with the uterus and the upper part of the vagina. It is separated from the anterior surface of the body of the uterus by the vesicouterine excavation, but