. The American journal of anatomy . te by means of one small duct or opening into eachvasa deferentia under the internal sphincter. The two ejaculatory ducts bound together as described abovebecome attached to the wall of the urethra below the point justmentioned and gradually become more deeply implanted in thethick posterior urethral wall. The utriculus prostaticus is en-tirely obliterated above but appears between the ejaculatoryducts in the middle of the prostatic urethra. These three struc- 314 OSWALD S. LOWSLEY tures bound together by connective and muscular tissue in avery characteristi
. The American journal of anatomy . te by means of one small duct or opening into eachvasa deferentia under the internal sphincter. The two ejaculatory ducts bound together as described abovebecome attached to the wall of the urethra below the point justmentioned and gradually become more deeply implanted in thethick posterior urethral wall. The utriculus prostaticus is en-tirely obliterated above but appears between the ejaculatoryducts in the middle of the prostatic urethra. These three struc- 314 OSWALD S. LOWSLEY tures bound together by connective and muscular tissue in avery characteristic way approach the urethra on a gradual slantmaintaining the globe-like appearance shown in fig. 4, pushingthe floor of the urethra up into its lumen, forming the verummontanum and causing the urethra to assume an inverted semi-lunar appearance. The ejaculatory ducts run parallel to thefloor of the urethra for a considerable distance and then ascendvertically to empty on the sides of the verum montanum. The Venfral or Alienor Lalerdl Lob<C^ Lateral t. Ejaculafory Due Prosfalicos. Fig. 4 cm. human fetus. Four months. Showing rather definite separa-tion of the middle lobefrom the lateral lobes. utriculus prostaticus in this series is very irregular in shape, beingthroughout most of its length in the shape of an inverted Y andgiving the appearance of two tubes which have fused at theirupper pole and not at the lower. Its opening into the urethrais below those of the ejaculatory ducts and there is a blind endextending a short distance down in the verum montanum underthe floor of the urethra. THE HUMAN PROSTATE GLAND 315 Fetus 12 cm-, long: {sixteen weeks) A series of sections cut in the longitudinal direction through thebladder and prostatic urethra of a fetus four months of age showsthe arrangement of the various structures in a very striking smooth muscle of the bladder wall stains very deeply and isbound in place by the lighter staining connective tissu
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1912
