Extenal Male Genitalia

Question 1

List layers of scrotum

Answer 1

1. Skin
2. Superficial fascia: superficial fatty layer is replaced by dartos muscle, deep membranous layer (Colle’s fascia)
3. External spermatic fascia
4. Cremaster muscle & fascia
5. Internal spermatic fascia
6. Loose areolar tissue

Question 2

Scrotal septum lacks…..layer from layers of scrotal sac

Answer 2

Skin

Question 3

Dartos muscle is supplied by……..

Answer 3

Sympathetic fibers reaching it through genital branch of genitofemoral n

Question 4

Describe nerve supply of skin of scrotum

Answer 4

1. Ant 1/3 is supplied by L1 via: a) ilioinguinal n, b) genital branch of genitofemoral n
2. Post 2/3 is supplied by S3 via scrotal nerves (from pudendal n) & perineal branch of posterior cutaneous nerve of the thigh

Question 5

Describe blood supply & lymph drainage of scrotum

Answer 5

BS: superficial & deep external pudendal (from femoral), cremasteric branch of inf epigastric art, scrotal branches of internal pudendal art
LD: end in suoerficial inguinal LNs

Question 6

Posterior border of testes is related to……., while ant border, med&lat surafces are related to……..

Answer 6

Epididymis & vas deferens
Tunica vaginalis

Question 7

Upper pole of testes provides attachment to ……& is related to…….

Answer 7

Spermatic cord
Appendix of testis

Question 8

Epididymis is separated from post border by……..

Answer 8

Sinus of epididymis

Question 9

The proximal part of processus vaginalis forms…..in adult

Answer 9

Vestiges of processus vaginalis

Question 10

……..is a dense, white fibrous coat covering testes, while……..is the innermost vascular coat of testis.

Answer 10

Tunica albuginra
Tunica vasculosa

Question 11

Tunica albugenia is thickened at……border, forming……, that sends septa dividing testis into…..

Answer 11

Post
Mediastinum testis
200-300 lobules

Question 12

Each lobule of testis contains…….that form……which break into……., & give rise to…….. which forms……

Answer 12

2 thin highly convoluted somniferous tubules
1 straight somnineferous ductules
Rete testis
Vasa efferentia
Head of epididymis

Question 13

Describe arterial supply of testis & epididymis

Answer 13

1. Testicular artery, branch from abdominal aorta
2. Artery of vas deferens: a branch from superior vesical art
3. Cremastric artery

Question 14

Veins emerging from testis form……

Answer 14

Paminiform plexus

Question 15

Describe LD of testis & epididymis

Answer 15

Pre-aortic & lateral aortic LNs

Question 16

Sympathetic fibers of testis are connected to…..segemnt

Answer 16

10th thoracic

Question 17

How to identify the side of testis?

Answer 17

1. Edidifymis is post to testis
2. Vas deferens arises from tail of epididymis & lies posteromedially
3. Sinus of epididymis is directed laterally

Question 18

Mention factors heat loss & gain in testis

Answer 18

Loss: very vascular scrital skin which is rich in sweat glands, absence of subcutaneous glands, relaxation of dartos muscle in hot weather leads to smooth & elongated scrotal skin with inc its surface area
Gain: contraction of dartos muscle that leads to corrugated and short scrotal skin with dec its surface area, contraction of cremaster muscle elevates testis near body

Question 19

List parts of epididymis and their connections

Answer 19

1. Head over upper end of testis connected by efferent ductules
2. Body main part along posterior border of testis
3. Tail connected to vas deferens

Question 20

List constituents of spermatic cord

Answer 20

3 arteries: testicular artery, cremastric artery, artery of vas
3V: vas deferens, venous plexus, vestige of processus vaginalis
3 nerves: genital branch of genitofemoral, sympathetic plexus around testicular artery, sympathetic plexus around artery of vas
3L: loose areolar tissue, lymphatics from testis & from epididymis

Question 21

Artery of vas arises from…….

Answer 21

Superior vesical artery

Question 22

List coverings of spermatic cord

Answer 22

1. Internal spermatic fascia from fascia transversalis
2. Cremaster muscle & fascia continuation of inner abdominal oblique
3. External abdominal oblique from aponeurosis of external abdominal oblique

Question 23

Bulb of penis contains…….

Answer 23

Spongy urethra

Question 24

Crura of penis are attached to……

Answer 24

Everted borders of pubic arch

Question 25

Body of penis consists of……..

Answer 25

One ventral (corpus spongiosus) & two dorsal (corpora cavernosa)

Question 26

Corpora cavernosa is continuous proximally with….,while corpora spongiosa proximally with…..& distally…….

Answer 26

Two crura
Bulb of penis, glans penis

Question 27

List arteries of penis

Answer 27

1. Dorsal arteries of penis run one on each side of dorsum of penis lateral to deep dorsal vein of penis
2. Deep arteries of penis run in centers of corpus cavernosus
3. Arteries of bulb along urethra in corpus spongiosum
4. Urethral artery: supplies spongy urethra

Question 28

List veins of penis

Answer 28

1. Superficial dorsal vein of penis: drains the prepuce & skin of the penis ends by dividing into 2 external superficial pudendal vessels
2. Deep dorsal vein of penis: drains glans & corpora cavernosa and ends in prostati

Question 29

Describe nerve supply & Lymph drainage of penis

Answer 29

-terminal branches of pudendal nerve run along lateral side of dorsal arteries of the penis
-end in superficial inguinal nodes
Glans penis LNs pass to deep inguinal & external iliac LNs