Penis

Question 1

Parts

Answer 1

1. Root
2. Body
3. Glans penis

Question 2

Root

Answer 2

Lies in perineum and consists of 3 structures:
1. 2 Crura
2. Bulb

Question 3

Crura

Answer 3

1. Posterior ends of the 2 corpora cavernosa of penis body 2. Attached to pubic arches and each covered by ischiocavernosus muscle

Question 4

Bulb

Answer 4

1. Posterior end of corpus spongiosum of penis body
2. Attached to perineal membrane
3. Covered by bulbospongisosus muscle
4. It is pierced by
   spongy urethra and bulbo-urethral glands ducts which open in spongy urethra

Question 5

Body

Answer 5

Free anterior part consisting
of 3 erectile tissue:
1. 2 corpora cavernosa: on dorsal aspect
2. 1 corpus spongiosum: on ventral aspect of corpora cavernosa and contains spongy urethra

Question 6

Glans penis

Answer 6

1. Distal enlarged end of corpus spongiosum
2. Covered by thin skin (prepuce) which is removed in circumcision and connected to external urethral meatus by median fold (frenulum)

Question 7

Ligaments

Answer 7

1. Fundiform ligament (sling-like)
2. Suspensory ligament of penis

Question 8

Fundiform ligament

Answer 8

Arises from lines alba inferior part and splits into 2 parts passing on each side of penis

Question 9

Suspensory ligament of penis

Answer 9

1. Fibroelastic structure which spreads out from symphysis pubis anterior surface
2. Fuses with deep fascia on penis dorsum and sides

Question 10

Arterial supply

Answer 10

Branches from internal pudendal artery:
1. 2 deep arteries
2. 2 arteries of bulb
3. Dorsal arteries

Question 11

2 deep arteries

Answer 11

1. Each runs inside corpus cavernosum supplying it
2. Each breaks into small tortuous helecine arteries supplying blood during erection

Question 12

2 arteries of bulb

Answer 12

Each runs inside penis bulb then in corpus spongiosum alongside urethra

Question 13

Dorsal arteries

Answer 13

1. Each runs lateral to deep dorsal veins of penis
2. Supplies penis skin and fascia

Question 14

Venous drainage

Answer 14

1. Superficial dorsal vein
2. Deep dorsal vein

Question 15

Superficial dorsal vein

Answer 15

1. Runs superficial to penis fascia in median plane of penis dorsum
2. It drains into great saphenous vein

Question 16

Deep dorsal vein

Answer 16

1. Runs deep to penis fascia in median plane of penis dorsum
2. It drains into prostatic venous plexus through gap between transverse perineal ligament and arcuate pubic ligament

Question 17

Nerve supply

Answer 17

Right and left dorsal nerves of penis

Question 18

Right and left dorsal nerves of penis

Answer 18

1. Arise from pudendal nerve
2. Each run lateral to dorsal artery of penis