Testis, epididymis, vas deferens and spermatic cord. OBJECTIVES. OBJECTIVES. I- Primary Sex Organ: Testis. II- Reproductive Tract: Epididymis. Vas Deferens. Spermatic cord. III- Accessory Sex Glands: Seminal vesicles. Prostate gland. Bulbourethral glands.
I- Primary Sex Organ:
II- Reproductive Tract:
III- Accessory Sex Glands:
IV- External genitalia:
PenisComponents of Male Reproductive System
The scrotum is a cutaneous sac consisting of two layers: heavily pigmented skin and closely related dartosfascia
It is divided into two compartments which are distinguished externally by a middle ridge called the raphe. Internally, the raphe connects to a muscular partition, the septum, which serves to divide the scrotum into its two areas
The Left scrotum is lower than the right.
One testis and one epididymis in each compartment
1- Posterior scrotal branches of the perineal artery, a branch of the internal pudendal artery.
2- Anterior scrotal branches of the deep external pudendal artery, a branch of the femoral artery.
3- Cremastericartery, a branch of the inferior epigastric artery.
Paired almond-shape gonads that are suspended in the scrotum by the spermatic cord
4 - 5 cm long
Weigh (10.5 – 14) g Functions:
-It develops in the abdomen; descends into the scrotum before birth;
-It is made up of tightly coiled tubes (SEMINIFEROUS TUBULES) where sperm are formed;
-scattered between tubules are the LEYDIG CELLS(produce testosterone and other androgens).
(Leydig cells) before birth;
Peritoneal covering, formed of parietal and visceral layers.
It surrounds testis & epididymis.
It allows free movement of testis inside scrotum.
It is a whitish fibrous capsule
Fibrous septae extend from the capsule, divide the testis into a (200-300) lobules.
Each lobule contains, (1-3) seminiferous tubules.
They are the site of the spermatogenesis.
They form the bulk of testicular tissue.
(a network of tubules)
It is the Site of merging of the Seminiferous tubules.
It is a direct branch from the abdominal aorta.
Venous drainage :
(Pampiniform plexus of veins.
Approximately a dozen veins which forms a network in the spermatic cord.
They become larger, converge as it approached the inguinal canal and form the Testicular vein.
Right Vein drains into IVC. before birth;
Left Vein drains into Left Renal Vein.
Follow arteries, veins end in Lumbar (par aortic) nodes
From scrotum, penis, prepuce:
Terminate in Superficial Inguinal nodes
A Single coiled tubule
6 M long
Located on the posterior & superior margins of the testis.
It is divided into:
Head, Body and Tail.
The Headreceives efferent ductules from testis.
The Tail is continuous with Vas Deferens
A Muscular tube before birth;45 cm long.
Carries sperms from the Epididymis to pelvic cavity.
Passes through the inguinal canal
It crossesthe ureter
Its terminal part is dilated to form the Ampulla of the vas
It joins the urethra in the prostateVas Deferens
Thank you before birth;