A manual of anatomy . of the disc between first andsecond lumbar vertebrae it continues as the ureter proper. The ureter proper is a small tube about 4 mm. thick and 10 to12 inches (25 to 30 cm.) in length. It extends from the upper borderof the second lumbar vertebra to the bladder. The first part {parsabdominalis) lies in the abdominal cavity and corresponds nearly tothe midinguinal line. The second half [pars pelvina) lies in the pel-vic cavity. When it reaches the bladder, it enters that structureobhquely and proceeds for nearly an inch ( cm.) between the mus-cular and mucous coats. Its
A manual of anatomy . of the disc between first andsecond lumbar vertebrae it continues as the ureter proper. The ureter proper is a small tube about 4 mm. thick and 10 to12 inches (25 to 30 cm.) in length. It extends from the upper borderof the second lumbar vertebra to the bladder. The first part {parsabdominalis) lies in the abdominal cavity and corresponds nearly tothe midinguinal line. The second half [pars pelvina) lies in the pel-vic cavity. When it reaches the bladder, it enters that structureobhquely and proceeds for nearly an inch ( cm.) between the mus-cular and mucous coats. Its opening in the bladder is guarded bymucous folds. 320 THE URINARY SYSTEM Its blood supply is from the renal, spermatic, ovarian, middlehemorrhoidal and superior vesical arteries. Its nerves are derivedfrom the renal, spermatic and hypogastric plexuses of the sympa-thetic system. THE BLADDER The bladder {vesica urinaria), located in the pelvic cavity justbehind the symphysis pubis, is the reservoir for the urine. When. Fig. -Median sagittal section through the bladder, prostate, urethra andpenis of the male. empty and contracted the bladder is almost spherical in shape. Itsshape in the infant is somewhat conical. In the empty collapsedstate, as in the cadaver, it is somewhat cup-shaped. When dis-tended, it is about 5J2 inches (14 cm.) in height, 41-^ inches ( 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 directeddownwar
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecthumananatomy, bookyea
