2.1 MGT: Scrotum

SCROTUM

• Pouch of skin divided by a median septum into two compartments; each of which is occupied by testis, epipidymis, and distal part of spermatic cord.

• Situated approximately two-third of the distance from the preputial opening into the anus

• Functions as temperature regulator for the tail of epididymis.

spherical

oblique craniocaudal

• In dogs, the scrotum lies between the thighs and ___ in shape; indented in an ___ ___ direction

Septum

Scrotal integument

Tunica dartos

Cremaster muscle

Vaginal tunic

what are the parts of the scrotum? (5)

Septum

median partition that is made up of all layers of scrotum except skin.

Scrotal integument

pigmented, covered with fine scattered hairs

Tunica dartos

poorly developed layer of smooth muscle mixed with collagenous and elastic fibers.

Cremaster muscle

arises from the caudal free border of internal abdominal oblique mm or in transversus abdominis mm

Vaginal tunic

evaginated pouch of peritoneum extending into each scrotal sac; it is covered by spermatic fascia of the abdominal wall

Parietal layer

Visceral layer

Vaginal cavity

Divisions of the vaginal tunic (3)

Parietal layer

outer wall of the vaginal tunic

Visceral layer

inner wall of the vaginal tunic

Vaginal cavity

space in between the parietal and visceral layers of the vaginal tunic

1. deep inguinal ring

2. transversalis fascia

3. superficial inguinal ring

4. abdominal fascia

5. spermatic fascia

6. parietal layer

7. vaginal tunic

Complete the formation of the scrotum

FORMATION: As it passes the___ ___ ___, it is invested by the___ ___ and as it emerges from the ___ ___ ___, it is joined by the superficial and deep ___ ___ forming now the ___ ___which covers the ___ ___ of the___ ___

1. Ventral scrotal branch and external pudendal artery

2. Cremasteric artery from the deep femoral artery

3. Scrotal arteries

4. Superficial perineal nerve

5. Genitofemoral nerve branches

name the vessels and nerves of the Scrotum (5)

Superficial perineal nerve

innervates the scrotum

Genitofemoral nerve branches

innervates the skin of the prepuce