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Male Internal Genital Organs
The male internal genital organs include the testes, epididymides, ductus deferentes, seminal glands, ejaculatory ducts, prostate, and bulbourethral glands The testes and epididymides (described in Chapter 2) are considered internal genital organs on the basis of their developmental position and homology with the internal female ovaries. However, because of theirexternal position postnatally and because in dissection they are encountered during the dissection of the inguinal region of the anterior abdominal wall, they were considered with the abdomen in

DUCTUS DEFERENS
. The ductus deferens:
Has relatively thick muscular walls and a minute lumen, giving it a cord-like firmness.
Begins in the tail of the epididymis, at the inferior pole of the testis.Is the primary component of the spermatic cord.
Penetrates the anterior abdominal wall via the inguinal canal.
Crosses over the external iliac vessels and enters the pelvis.
Passes along the lateral wall of the pelvis, where it lies external to the parietal peritoneum.
Ends by joining the duct of the seminal gland to form the ejaculatory duct.
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. Hemisected male pelvis and perineum Thegenital organs are demonstrated: testis, epididymis, ductus deferens, ejaculatory duct, and penis, with the accessory glandular structures (seminal gland, prostate, and bulbourethral gland). The spermatic cord connects the testis to the abdominal cavity, |
During the pelvic part of its course, the vase maintains direct contact with the peritoneum; no other structure intervenes between them. Thepipeline crosses over the ureter near the bladder posterolateral angle, running between the ureter and the peritoneum of the ureteral fold to reach the bottom of the bladder. The basis of the development of this relationship is shown later to the bladder, the ductus arteriosus deferent is superior to the seminal gland, then descending medial to the urethra and gland. Here expands the vas deferensto form blister of the vas deferens before its termination supply Arterial and venous drainage of the vas deferens.
Arterial Supply and Venous Drainage of Ductus Deferens.
The tiny artery to the ductus deferens usually arises from a superior (sometimes inferior) vesical artery and terminates by anastomosing with the testicular artery, posterior to the testis. Veins from most of the duct draininto the testicular vein, including the distal pampiniform plexus. Its terminal portion drains into the vesicular/prostatic venous plexus

SEMINAL GLANDS
Each seminal gland (vesicle) is an elongated structure (approximately 5 cm long but sometimes much shorter) that between the fundus of the bladder and the rectum). The seminal glands are obliquely placed superior to the prostate and do notstore sperms, as the “vesicle” term implies. They secrete a thick alkaline fluid with fructose (an energy source for sperms) and a coagulating agent that mixes with the sperms as they pass into the ejaculatory ducts and urethra.
The superior ends of the seminal glands are covered with peritoneum and lie posterior to the ureters, where the peritoneum of the rectovesical pouch separates them from therectum. The inferior ends of the seminal glands are closely related to the rectum and are separated from it only by the rectovesical septum
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. Structures crossing male ureter in abdomen and pelvis. During development, as the testis descends inferiorly and laterally from its original position (medial to the site of the kidneys on the posterior abdominal wall) to and then through the inguinalcanal, the ureter is crossed by testicular vessels in the abdomen and by the ductus deferens in the pelvis. This relationship is retained throughout life. |
Arterial Supply and Venous Drainage of Seminal Glands.
The arteries to the seminal glands derive from the inferior vesical and middle rectal arteries

EJACULATORY DUCTS
The ejaculatory ducts are slender tubes that arise by the union of...