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SPLANCHNOLOGY 





part of the abdominal wall which lies between the symphysis pubis and the umbili- 

 cus" (Symington 1 ). 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 



Sacrum 



Symphysis pubis 

 Urethra 



Anal canal 



Fio. 1137. Sagittal section through the pelvis of a newly born male child. 



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 three 

 years, and then more slowly until the ninth year, after which it remains stationary 

 until puberty, when it again slowly descends and reaches its adult position. 



Uterine tube 



Cavity of uterus 

 Sigmoid colon 



Rectum 



Anal canal 



Round ligament of 

 J uterus 



1 - Bladder 



Symphysis pubis 



Urethra 

 Vagina 



Fio. 1 138. Sagittal section through the pelvis of a newly born female child. 



The Female Bladder (Fig. 1139). In the female, the bladder is in relation 1 

 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 



1 The Anatomy of the Child. 



