. Anatomy, descriptive and applied. Anatomy. 750 THE VASCULAR SYSTEMS serves to connect the common iliac, iliolumbar, lumbar, and azygos veins of the corresponding side of the body. The spermatic veins {m. sperviaticae) (Fig. 526) emerge from the back of the testis, and receive tributaries from the epididymis; they unite and form a convo- luted plexus called the spermatic plexus {plexus pampiniformis), which constitutes the greater mass of the cord; the vessels composing this plexus are very numerous, and ascend along the cord in front of the vas deferens; below the external abdom- inal ring t
. Anatomy, descriptive and applied. Anatomy. 750 THE VASCULAR SYSTEMS serves to connect the common iliac, iliolumbar, lumbar, and azygos veins of the corresponding side of the body. The spermatic veins {m. sperviaticae) (Fig. 526) emerge from the back of the testis, and receive tributaries from the epididymis; they unite and form a convo- luted plexus called the spermatic plexus {plexus pampiniformis), which constitutes the greater mass of the cord; the vessels composing this plexus are very numerous, and ascend along the cord in front of the vas deferens; below the external abdom- inal ring they unite to form three or four veins, which pass along the inguinal canal, and, entering the abdomen through the internal abdominal ring, coalesce to form two veins, which ascend on the Psoas muscle behind the peritoneum, lying one on either side of the spermatic artery. These unite to form a single vein, which opens on the right side into the inferior vena cava at an acute angle; on the left side into the left renal vein at a right angle (Fig. 527). The spermatic. Fig. 527.—Terminations of tlie right and left spermatic veins. (Poirier and Charpy.) veins are provided with valves, particularly at the termination. The left sper- matic vein passes behind the sigmoid flexure of the colon. ^ Applied Anatomy.—The spermatic veins are very frequently varicose, constituting the dis- ease known as varicocele. Though it is quite possible that the originating cause of this affection may be a congenital abnormality either in the size or number of the veins of the spermatic plexus, still it must be admitted that there are many anatomical reasons why these veins should become varicose—viz., the imperfect support afforded to them by the loose tissue of the scrotum; their great length; their vertical course; their dependent position; their plexiform arrangement in the scrotum, with their termination in one small vein in the abdomen; their few and imperfect valves; and the fact that they
Size: 1340px × 1864px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1913
