Podcast
Questions and Answers
What is the main function of the epididymis?
What is the main function of the epididymis?
- To regulate blood pressure
- To aid in fertilization
- To produce testosterone
- To store sperm (correct)
What is the terminal part of the vas deferens dilated to form?
What is the terminal part of the vas deferens dilated to form?
- Prostate gland
- Ejaculatory duct
- Ampulla of the vas deferens (correct)
- Seminal vesicle
Which of the following structures does the vas deferens cross on the side wall of the pelvis?
Which of the following structures does the vas deferens cross on the side wall of the pelvis?
- Internal iliac vein
- External iliac vein
- Obturator nerve and vein
- All of the above (correct)
What is the main blood supply to the scrotum?
What is the main blood supply to the scrotum?
Where is the seminal vesicle located?
Where is the seminal vesicle located?
What is the prostate gland responsible for?
What is the prostate gland responsible for?
What is the main function of the seminal vesicle?
What is the main function of the seminal vesicle?
What is the effect of senile enlargement of the prostate gland?
What is the effect of senile enlargement of the prostate gland?
What is formed by the union of the vas deferens and the duct of the seminal vesicle?
What is formed by the union of the vas deferens and the duct of the seminal vesicle?
What is the shape of the prostate?
What is the shape of the prostate?
What is the function of the seminal vesicles?
What is the function of the seminal vesicles?
What is the apex of the prostate related to?
What is the apex of the prostate related to?
What is the common site of metastasis of cancer prostate?
What is the common site of metastasis of cancer prostate?
What separates the posterior surface of the prostate from the rectum?
What separates the posterior surface of the prostate from the rectum?
What is the location of the posterior lobe of the prostate?
What is the location of the posterior lobe of the prostate?
What is the function of the prostatic venous plexus?
What is the function of the prostatic venous plexus?
What is the usual site for senile enlargement of the prostate?
What is the usual site for senile enlargement of the prostate?
What is the origin of the nerve supply to the prostate?
What is the origin of the nerve supply to the prostate?
What is the usual route of spread of cancer prostate?
What is the usual route of spread of cancer prostate?
What are the components of the male external genital organs?
What are the components of the male external genital organs?
What is the function of the Cremasteric muscle?
What is the function of the Cremasteric muscle?
What is the location of the median lobe of the prostate?
What is the location of the median lobe of the prostate?
What is the purpose of the levator ani?
What is the purpose of the levator ani?
Which fascia is continuous with the deep membranous layer of the ant.abd.wall?
Which fascia is continuous with the deep membranous layer of the ant.abd.wall?
What is the length of the uncoiled epididymal tube?
What is the length of the uncoiled epididymal tube?
What is the origin of the Cremasteric muscle?
What is the origin of the Cremasteric muscle?
What is the function of the Tunica vasculosa?
What is the function of the Tunica vasculosa?
What is the artery that supplies the testis?
What is the artery that supplies the testis?
What is the direction of the lymphatic drainage of the testis?
What is the direction of the lymphatic drainage of the testis?
What is the name of the reflex that occurs when the cremasteric muscle contracts?
What is the name of the reflex that occurs when the cremasteric muscle contracts?
Study Notes
Male Genital System
Scrotum
- Consists of superficial fascia, which includes:
- Superficial fatty layer replaced by Dartos muscle
- Deep membranous layer (Colle's fascia) continuous with deep membranous layer of ant. abd. wall (Scarpa's fascia)
- Lymphatic drainage → Superficial inguinal LN
Testis
- Oval shape
- Coverings: 3 coats from outside inwards:
- Tunica vaginalis: has visceral and parietal layers, covers the whole testis except posterior border
- Tunica albuginea: fibrous coat all around testis
- Tunica vasculosa: innermost vascularized C.T.
- Blood supply: Testicular artery from abdominal aorta
- Venous drainage: Pampiniform plexus of veins → testicular v. → Rt. testicular vein → Inferior Vena Cava, Lt. testicular vein → Left renal vein
- Lymph drainage: Pre-aortic & para-aortic L.N.
Epididymis
- Forms a cap on the upper pole of testis, descends lateral to posterior border till its lower pole
- Highly coiled duct, approximately 6 meters long when uncoiled
- Parts:
- Head: forms a cap on the upper pole of testis
- Body: formed of a single coiled tube
- Tail: lower end of epididymis, continues as the vas deferens
- Function: reservoir for sperms
Spermatic Cord
- Constituents: vas deferens, duct of seminal vesicle, and nerves
- Coverings: spermatic fascia, cremasteric fascia, and external spermatic fascia
Vas Deferens
- Begins at the epididymis, crosses the ureter, and descends medial to seminal vesicle
- Terminal part is dilated to form the ampulla of the vas deferens, which joins the duct of seminal vesicle to form the ejaculatory duct
Prostate Gland
- Conical shape, with a base above, an apex below, and 4 surfaces (anterior, posterior, and 2 inferolateral)
- Position: lies immediately inferior to the neck of the bladder and anterior to the rectum
- Lobes: divided into 5 lobes by the urethra and the 2 ejaculatory ducts:
- Anterior lobe
- Posterior lobe (usual site for cancer)
- Right and left lateral lobes (usual site for senile enlargement)
- Median lobe
- Blood supply: branches from inferior vesical, middle rectal, and internal pudendal arteries
- Veins: prostatic venous plexus drains into internal iliac veins
- Lymph drainage: internal iliac nodes and sacral lymph nodes
- Nerve supply: from inferior hypogastric plexus
- Clinical note: a venous communication is present between prostatic venous plexus and internal vertebral venous plexus, explaining why cancer prostate usually sends metastases to the vertebral bodies.
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Description
This quiz covers the anatomy of the male genital system, including the scrotum, testis, epididymis, and spermatic cord. Learn about their layers, blood supply, lymphatics, and functions.
