Inguinal Canal

Question 1

Where is the Inguinal Canal?

Answer 1

From the ASIS to the Pubic Tubercle

Question 2

Where do the testes originate from and what layer embryologically derived from?

Answer 2

It is derived from the intermediate mesoderm and the posterior abdominal wall.

Question 3

What is the function of the gubernaculum?

Answer 3

The gubernaculum helps the testes descend from the abdominal cavity. The testes will then follow the contraction of the gubernaculum which passes through multiple muscle layers. Migration ends in the scrotum.

Question 4

What is the remnant of the gubernaculum for guys? girls?

Answer 4

gubernaculum remnant for guys–> scrotal ligament

gubernaculum remnant for girls–> round ligament of the
uterus

Question 5

What layers make up the spermatic cord?

Answer 5

transversalis fascia, internal oblique muscle, external oblique muscle

Question 6

What makes up the scrotum proper?

Answer 6

Dartos Fascia + Skin

Question 7

what are the original layers that made up each part of the testes?

Answer 7

Dartos Smooth Muscle–> Scarpa’s Fascia

External Spermatic Fascia–> External Oblique Muscle

Cremaster Muscle–> Internal Oblique Muscle

Tunica Vaginalis–>
Parietal & Visceral Peritoneum-Derived

Question 8

What innervates the cremaster muscle?

Answer 8

Genitofemoral Nerve

Question 9

What is the Dartos Smooth Muscle under control of?

Answer 9

Sympathetic Innervation

Question 10

The Scrotal Blood Supply is divided:
Anterior Portions of the Scrotum
Posterior Portions of the Scrotum

Answer 10

Anterior Portions of The Scrotum–>
blood supply occurs from the anterior scrotal branches from the pudendal artery

Posterior Portions of the Scrotum–>
blood supply occurs from the posterior scrotal branches from the pudendal artery

Question 11

The nerve innervation of the scrotum can be divided into both anterior and posterior portions of the scrotum.

Answer 11

Anterior Innervation–> Branches of the Ilioinguinal Nerve

Posterior Innervation–> Branches of the Ilioinguinal Nerve

Question 12

The nerve supply to the anterolateral portion of the scrotum?

Answer 12

The genitofemoral nerves

Question 13

The nerve supply to the postero-inferior portion of the scrotum.

Answer 13

Perineal Branch of Posterior Cutaneous Nerve of Thigh

Question 14

Cremaster Muscle + External Spermatic Fascia

Answer 14

Afferent (Sensory): ilioinguinal nerve

Efferent (Motor): genitobranch of the genitofemoral nerve

Question 15

What artery supplies the testicle?

Answer 15

The testicular artery and gonadal artery for the reguvination of the Leydig and Interstitial cells of the testes.

Question 16

What is the route of the vas deferens?

What is the blood supply for the vas deferens?

Answer 16

It goes from the testes to the epididymis through to the ejaculatory duct.

Blood supply for the vas deferens will be–> artery of the ductus deferens

Question 17

Where does the Right Gonadal Artery come from? Where does the Left Gonadal Artery come from?

Answer 17

It comes from the branch of the Aorta from the Right Side.

**It comes from the Left Renal Artery

Question 18

What is a varicocele?

Answer 18

A varicocele causes the compression and expansion of veins that follow the testicular/gonadal artery.

***The compression of the Left Renal Artery causes overfilling of the plexus + expansion of the left testicle.