Male and Female External Genetalia

Question 1

What is the Scrotum derived from?

Answer 1

Skin of Abdominal Wall

Superficial fascia of Abdominal wall

Question 2

What are the contents of the scrotum

Answer 2

Testes
Epididymis
Distal portion of spermatic cord

Question 3

Describe the skin of the Scrotum

Answer 3

• Thin
• Pigmented
• Has a midline scrotal raphe
• Lined on the inside by the Dartos Muscle which causes rugose

Question 4

What are the connective tissue layers of the scrotum

Answer 4

From superficial to deep:

• Skin
• Dartos Muscle
• Tunics of spermatic cord:
• –Ext. Spermatic Fascia
• –Cremasteric Muscle and Fascia
• –Int. Spermatic Fascia

ALL THESE LAYERS FUSE AND LIE SUPERFICIAL TO TUNICA VAGINALIS

Question 5

What is the structure of the Tunica Vaginalis

Answer 5

Has two layers:

• Visceral layer: covers the testis
• Parietal layer: covers the testis and epididymis

Question 6

What is the blood supply of the Scrotum

Answer 6

Supplied and drained by:

–External pudendal arteries and veins

Question 7

What is the lymphatic drainage of the scrotum

Answer 7

Superficial inguinal nodes

Question 8

What is the innervation of the scrotum

Answer 8

Anterior:

• Ilioinguinal N.
• Genital br. of Genitofemoral N.

Posteroir:

• Posterior Scrotal N.
• Perineal Branches (of the posterior femoral cutaneous N)

Question 9

What are the three parts of the penis

Answer 9

Root, body, glans

Question 10

What makes up the root of the penis

Answer 10

Bulb and crura

Question 11

What are the two muscles associated with erectile bodies

Answer 11

Bulbospongiosus muscle

Ischiocavernosus muscle

Question 12

What are the erectile bodies of the penis? Also, what is the fascia that covers them?

Answer 12

Erectile bodies:

• Paired Corpora Cavernosa
• Corpus Spongiosum

Surrounded by deep fascia (Buck’s fascia)

Question 13

What is the blood supply of the penis

Answer 13

Internal Pudendal Arteries:

• Dorsal arteries of penis
• Deep arteries
• Artery of bulb of penis

Skin of penis supplied by the external pudendal arteries

Question 14

What is the lymphatic drainage of the penis?

Answer 14

Superficial inguinal nodes

Question 15

What is the innervation of the penis?

Answer 15

Sensory and Sympathetic:
-Dorsal nerve of the penis (from Pudendal Nerve)

Skin:
-Ilioinguinal Nerve

Parasympathitic nerves:

• Pelvic Splanchnic Nerves
• Enables erection

Question 16

What are the connective tissue layers that cover the testis

Answer 16

From Deep to superficial:

• Tunica Albuginea (tough fibrous layer)
• Visceral layer of Tunica Vaginalis
• Parietal layer of Tunica Vaginalis

Question 17

What is the blood supply to the testis

Answer 17

Testicular A. (in Spermatic Cord)

Question 18

What is the venous drainage from the Testis

Answer 18

Pampiniform plexus

Question 19

What are the abdominal wall derivatives of all of the coverings of the testis

Answer 19

Scrotal skin - Abdominal skin

Tunica dartos - Dartos Fascia and Muscle

External Spermatic Fascia - External Oblique

Cremaster muscle and Fascia - Internal oblique

Internal spermatic fascia - transversalis fascia

Tunica vaginalis (both) - Peritoneum

Question 20

What forms the epididymis?

Answer 20

Convolutions of narrow duct of the Ductus Deferens

Question 21

Where is the epididymis located?

Answer 21

Posterior aspect of testes

Question 22

What are the parts of the epididymis

Answer 22

Head,
-Formed from ends of efferent ductules from testis

Body,

Tail
-Continuous with Ductus Deferens

Question 23

What is the arterial supply of the epididymis

Answer 23

Testicular A

Artery of the vas

Question 24

What is the venous drainage of the epididymis

Answer 24

Pampiniform plexus —> Testicular vein

Question 25

How long is the ductus derens

Answer 25

25cm long

Question 26

What is the course of the ductus deferens

Answer 26

Traverses Inguinal Canal | Crosses ureter medially to enter ejaculatory duct

Question 27

What is the blood supply of the ductus deferens

Answer 27

Deferential A. (from Inferior Vesicle A.) AKA artery of the vas

Question 28

What is included in the female vulva

Answer 28

``` Mons Pubis Labia Majora Labia Minora Clitoris Vestibule of Vagina Bulbs of Vestibule Greater vestibular glands ```

Question 29

What are the contents of the vulva

Answer 29

External Urethral meatus Vaginal Introitus (most infeiror) Opening of ducts of paraurethral gland Opening of ducts of greater vestibular gland Bulbs of vestibule

Question 30

What are the parts of the clitoris

Answer 30

Root and Body

Question 31

Where is the clitoris located

Answer 31

Where two sides of labia minora meet anteriorly 2cm anterior to external urethral meatus

Question 32

What are the components of the body of the clitoris

Answer 32

Two crura Two corpora cavernosa Gland clitoris

Question 33

Describe the prepuce of clitoris

Answer 33

Anterior extension of Labia Minora

Question 34

What is the blood supply to the vulva

Answer 34

External Pudendal Arteries Internal Pudendal Arteries -Labal and Clitoral branches

Question 35

What is the venous drainage of the vulva

Answer 35

Internal pudendal vein

Question 36

What is the lymphatic drainage of the vulva

Answer 36

Superficial Inguinal Nodes

Question 37

What is the innervation of the Vulva

Answer 37

Anterior Labial Nerves (Ilioinguinal N.) Perineal br. (from Posterior Femoral Cutaneous N.) Posterior Labial Nerves (from Pudendal N.)

Question 38

What are the clinical implicaitons of a episiotomy

Answer 38

7 o'clock direction cut allows missing: - Perineal Body (near 6 o'clock) - Spongy Tissue (near 9 o'clock)

Question 39

What is swelling of the scrotum often caused by

Answer 39

Hydroceles due to Testicular Tortion