7.1 Scrotum, Spermatic Cord, Testis/Male UG Triangle

Question 1

Identify the spermatic cord

Answer 1

Emerges from inguinal canal via superficial ring.

Question 2

Identify the inguinal canal and superficial inguinal ring

Answer 2

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Question 3

Identify the external spermatic fascia and originating layer.

Answer 3

This thin, outermost layer is continuous with the external abdominal oblique.

Question 4

Identify the cremasteric fascia and proximally the cremaster muscle and originating layer.

Answer 4

This is the middle layer, continuous with the internal abdominal oblique.

Question 5

Identify the internal spermatic fascia and originating layer.

Answer 5

This thin, innermost layer is an extension of the transversalis fascia.

Question 6

Identify the ductus deferens

Answer 6

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Question 7

Identify the testicular artery. From where does this branch?

Answer 7

Branches from abdominal aorta.

Question 8

Identify the testicular veins and pampiniform plexus

Where do the rt. and lft. testicular veins drain?

Answer 8

Right testicular vein drains to ICV.
Left testicular vein drains to left renal vein.
Pampiniform plexus involved in temperature regulation.

Question 9

Identify the tunica vaginalis:

• Parietal layer
• Visceral layer

Answer 9

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Question 10

Identify the epididymis and its components

• Head
• Efferent ductules
• Body
• Tail

Answer 10

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Question 11

Identify the testis and their components

• Tunica albuginea
• Septa
• Lobules
• Seminiferous tubules
• Mediastinum testis
• Rete testis

Answer 11

Tunica: thick white outer coat
Septa: arise from the tunica albuginea, and divide the testis into lobules.
Seminiferous tubules: Three to five tubules make up each lobule in the testis.???
Mediastinum testis: a posterior, midline thickening of the tunica albuginea.
Rete testis: They appear as tiny holes in the mediastinum testis.

Question 12

Identify the following components of the penis

• Glans
• Prepuce
• Shaft
• Corona
• External urethral orifice
• Frenulum
• Corpora cavernosa
• Penile septum
• Tunica albuginea
• Deep penile artery
• Spongy urethra
• Superficial and deep dorsal veins of the peins

Answer 12

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Question 13

Identify the bulbospongiousus muscle.

Describe attachments/function and innervation.

Answer 13

• thin muscle fibers covering the bulb of the penis. The bulbospongiosus runs anteriorly from the perineal body to the clitoris in females and to the penile raphe in males.
  -Fxn:Compress bulb and crura when contracted, which aids
  • Emptying spongy urethra of residual urine/semen
  • Erection by increasing pressure on erectile tissue in the root and compressing venous return (i.e. deep dorsal vein of penis)

-Innervation: Pudendal nerve (S2 to S4).

Question 14

Bulb of the penis

Answer 14

Bulb and crura make up root of penis

Question 15

Ischiocavernosus muscle

Answer 15

The ischiocavernosus originates from the ischial ramus and inserts onto the crus of the clitoris or the penis
o Paired muscles, covering crura
o Compress each crus, which aids
• Achieving and maintaining an erection via the compression of the crura (forcing blood distally) and by retarding venous return

Innervation: Pudendal nerve (S2 to S4).

Question 16

Identify the paired crura of the penis.

Answer 16

attached to ischiopubic rami

Question 17

Identify the Deep transverse perineal muscle.

Describe attachments/function, and innervation.

Answer 17

• The deep transverse perineal originates from the inferior pubic ramus and ischial ramus and inserts onto the wall of the vagina or the prostate as well as the perineal body (central tendon).
• Fxn: The deep transverse perineal helps hold the perineal body and pelvic organs in place and supports the viscera passing through it.
• Innervation: Pudendal nerve (S2 to S4).