MALE REPRODUCTIVE SYSTEM It is a series of

MALE REPRODUCTIVE SYSTEM It is a series of ducts n and tubules. It has components in n the abdomen, pelvis and perineum. The major n components are: Testis. n Epididymis. n Ductus deferens. n Ejaculatory ducts. (On n each side).

MALE GENITAL ORGANS Three types of n accessory glands are associated : Unpaired Prostate. n A Pair of Seminal n vesicles. A Pair of Bulbourethral glands. n

VAS DEFERENS (PELVIC PART) It descends along n the lateral pelvic wall. It crosses the ureter at the ischial spine. n

VAS DEFERENS It runs downward and n medially along the posterior surface of the bladder. Its terminal part is n dilated to form the Ampulla of the vas deferens. The inferior end of the n ampulla narrows and shares in forming the ejaculatory ducts.

EJACULATORY DUCTS They are formed by n the union of the lower end of the vas deferens and the duct of the seminal vesicle. The ducts pierce the n posterior surface of the prostate.

EJACULATORY DUCTS They open into the prostatic urethra, close to the margins of the prostatic utricle. They drain the n seminal fluid into the prostatic urethra. n

SEMINAL VESICLES Two lobulated organs n (5) cm long. Lying on the posterior n surface of the bladder. They are formed of a n much coiled tube embedded in a connective tissue.

SEMINAL VESICLES Upper ends : n Widely separated. n Lower ends: n Close together. n Medial : n Terminal part of the vas deferens. n

SEMINAL VESICLES Posterior: n The rectum. n Inferior : n They form the n ejaculatory ducts.

SEMINAL VESICLES Function: n Their secretion n contributes to increase the volume of the semen. It can nourish the n spermatozoa.

PROSTATE It is unpaired n accessory structure of the male reproductive system. It surrounds the urethra in the pelvic cavity. n

SHAPE It is conical in shape. n Its base lies against n the neck of the bladder. Its apex lies against n the urogenital diaphragm.

RELATIONS Superior : n Neck of the bladder. n The urethra enters n the center of the base of the prostate. The smooth muscle n of the two organs is continuous.

RELATIONS Anterior : n Symphysis pubis. n It is separated from it n by retropubic pad of fat (in cave of Retzius). Its fibrous sheath is n connected to the pubic bones by puboprostatic ligaments.

RELATIONS Posterior : n Rectal ampulla. n It is separated from it by rectovesical septum (fascia of Denonviller). It is formed in the n fetal life by fusion of the inferior extension of the rectovesical pouch. n

PROSTATE The ejaculatory n ducts pierce the upper part of the posterior surface.

RELATIONS Lateral: n Anterior fibers of levator ani (levator prostate). n

STRUCTURE It is surrounded n by a fibrous capsule (internally) and a fibrous sheath (from the pelvic visceral fascia) externally.

STRUCTURE The glands are n embedded in a mixture of smooth muscle and connective tissue. They open in the prostatic urethra. n

LOBES It is incompletely divided into (5) lobes (according to urethra). Anterior : n In front of the n urethra. It has no n glandular tissue. n

LOBES Median (middle). n It is wedge in shape. It is between the n urethra and the ejaculatory ducts. Its upper part forms the uvula vesicae in the trigone. It is rich in glands. n n n

LOBES Posterior : n It is behind the urethra, below the ejaculatory ducts. It has glandular tissue. n n

LOBES Lateral (right and n left) : Lie on either side of n the urethra. They are rich in n glands. They are connected n to each other by a vertical groove on the posterior surface of the prostate.

FUNCTION It produces thin milky n fluid that added to the seminal fluid at the time of ejaculation. It is alkaline secretion. n It neutralizes the acidity of the vagina. n

ARTERIAL SUPPLY Prostatic n branches from : Inferior vesical. n Middle rectal. n

VENOUS DRAINAGE Prostatic venous n plexus : It is between the n capsule and the fibrous sheath. It receives: n Vesical veins. n Deep dorsal vein of the penis. It drains into: n Internal iliac vein. n n

NERVE SUPPLY Inferior n hypogastric plexus. The sympathetic n fibers stimulate the smooth muscle in the capsule and stroma to contract during ejaculation.

PROSTATIC URETHRA It is the widest and most dilatable part of the urethra. It is (3 cm) long. n It begins at the neck of n the bladder. It passes through the n prostate from the base to the apex. It continues with the n membranous part of the urethra. n n

PROSTATIC URETHRA On the posterior wall: 1. Urethral crest: n A longitudinal ridge. n 2. Prostatic sinus: n It is a groove on each side of the crest. The prostatic glands n open in the sinuses. n n

POSTERIOR WALL 3. Prostatic utricle : n It is a depression on n the summit of the urethral crest. It is analog to the n uterus and vagina in female. The ejaculatory ducts n open on the edge of the mouth of the utricle.