24. Male Pelvic Contents and the Anal Triangle

Question 1

What do the seminal vesicles secrete?

Answer 1

Fructose (liquid component of semen)

Question 2

Anatomical relation of prostate gland to bladder?

Answer 2

Prostate is inferior to bladder

Question 3

What does the prostate secrete?

Answer 3

Proteolytic enzymes

Acid phosphatase

Question 4

Arterial supply of prostate?

Answer 4

Internal pudendal
Middle rectal
Inferior vesical

Question 5

Venous drainage of prostate?

Answer 5

Deep dorsal of penis to internal iliac plexus

Question 6

Name 2 structures that support the prostate gland?

Answer 6

Pubo-prostatic ligament

Levatore prostatae

Question 7

Learn lymphatic drainage of pelvic structures

Answer 7

SLIDE 11

Question 8

Lymphatic drainage of skin of penis and wall of scrotum?

Answer 8

Superficial inguinal nodes

Question 9

Lymphatic drainage of testes?

Answer 9

Aortic nodes at root of testicular artery (L2)

Question 10

What are the two anatomical triangles at the base of the pelvis?

Answer 10

Urogenital

Anal

Question 11

What are the boundaries of the ischioanal (rectal) fossa?

Answer 11

Walls - ischial tuberosity, rectum/ anal canal
Roof - levator ani
Floor - skin

Question 12

What are the contents of the ischioanal fossa?

Answer 12

Branches of pudendal nerve
Pudendal artery
Pudendal vein
Adipose tissue

Question 13

What type of muscle are the anal sphincters?

Answer 13

Internal - smooth

External - skeletal

Question 14

At what point does the rectum become the anal canal?

Answer 14

When the rectum pierces the pelvic floor

Question 15

From which 2 structures does the external anal sphincter run between (anterior to posterior)?

Answer 15

Perineal body to

Anococcygeal ligament

Question 16

Function of external anal sphincter?

Answer 16

Closes anus

Question 17

Innervation of external anal sphincter?

Answer 17

Pudendal nerve (S2-S4) inferior rectal branch

Question 18

What is the anocutaneous line?

Answer 18

aka white line

Transition to true skin

Question 19

What is the relevance of the pectinate line in the foetus?

Answer 19

Site of anal membrane

Question 20

Arterial supply of anal canal?

Answer 20

Above pectinate line - superior rectal

Below pectinate line - inferior rectal

Question 21

Lymphatic drainage of anal canal?

Answer 21

Above pectinate line - internal iliac

Below - superficial inguinal

Question 22

Innervation of anal canal?

Answer 22

Above pectinate line - visceral motor and sensory

Below - somatic motor and sensory