A manual of anatomy . cm.)in width and nearly 4 inches (10 cm.) dorsoventrally, and thenextends into the abdominal cavity. In the female the width isgreater and the dorsoventral dimension less. Its capacity is about ipint (500 to 700 ) but is usually emptied when it contains 8 to 10ounces (about 300 ). THE BLADDER 321 The bladder presents an apex, a base, a superior and ventroinjeriorand two lateral surfaces and illy defined borders. The apex {vertex vesica) is best seen in the nearly empty bladderand lies just behind the symphysis pubis. From this the urachusextends to the umbilicus. T
A manual of anatomy . cm.)in width and nearly 4 inches (10 cm.) dorsoventrally, and thenextends into the abdominal cavity. In the female the width isgreater and the dorsoventral dimension less. Its capacity is about ipint (500 to 700 ) but is usually emptied when it contains 8 to 10ounces (about 300 ). THE BLADDER 321 The bladder presents an apex, a base, a superior and ventroinjeriorand two lateral surfaces and illy defined borders. The apex {vertex vesica) is best seen in the nearly empty bladderand lies just behind the symphysis pubis. From this the urachusextends to the umbilicus. The base {fundus vesica) is directeddownward and backward (dorsally) and is partly in relation withrectum and seminal vesicles of the male and vagina of the is partially invested by peritoneum. The superior surface isdirected toward the abdominal cavity and its shape varies with thestate of distention. It is invested with peritoneum. The venlro-inferior surface is directed downward and forward (ventrally) and. Fig. 235.—Bladder laid open showing the trigone. when the bladder is distended it is partially invested with perito-neum. The so-called neck of the bladder is at the lowest part of theorgan, at the junction of the base and ventroinferior surface. Herethe urethra begins and it represents the most fixed part of the blad-der. The lateral surfaces are directed downward and outward andmeet in front at the urethral orifice. Each is partially invested withperitoneum. When the empty contracted bladder is opened the mucosa exhib-its folds, or rug® except at the trigone. In the distended bladderthese folds disappear. The trigone {trigonum vesicce) is a triangulararea at the neck; at the basal angles are the two ureteral orifices and 32 2 THE URINARY SYSTEM at the apical angle is the urethral orifice. The sides are of equallength and measure about ij^ inches (3 cm.) in the empty bladderand i>^ inches ( cm.) in the distended condition. The ureteralorifices are usua
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecthumananatomy, bookyea
