Lecture 2 - Male Pelvic Contents and the Anal Triangle

Question 1

What is the Vas Deferens?

Answer 1

A muscular tube.

Question 2

What is the inguinal canal?

Answer 2

A slit in the anterior muscles of the abdominal wall above the medial half of the inguinal ligament that contains the spermatic cord and the ilioinguinal nerve

Question 3

What does the Vas Deferens do?

Answer 3

Joins duct from the seminal vesicle to form ejaculatory duct.

Question 4

Where does the Vas Deferens run?

Answer 4

Into the prostate to meet the urethra.

Question 5

How long is a seminal vesicle?

Answer 5

About 5cm long, but 10-15cm long.

Question 6

What does a seminal vesicle do?

Answer 6

Secretes the liquid component of semen and fructose.

Question 7

Where is the prostate gland?

Answer 7

Inferior to the bladder.

Question 8

What does the prostate gland produce?

Answer 8

Proteolytic enzymes and acid phosphatase.

Question 9

What vessels are contained in the prostate gland?

Answer 9

Parts of the urethra and ejaculatory ducts.

Question 10

What arteries supply the prostate gland?

Answer 10

Internal pudenal, middle rectal and inferior vesicle arteries.

Question 11

What is the venous drainage of the prostate?

Answer 11

Deep dorsal of the penis –> Plexus –> Internal iliac.

Question 12

What is the function of the puboprostatic ligament?

Answer 12

Supporting the prostate gland.

Question 13

What is the levator prostatae?

Answer 13

Part of the the levator ani muscle group, which acts to separate the base of the pelvic cavity from the ischiorectal fossa lying inferiorly.

Question 14

What part of the prostate does prostatic enlargement affect?

Answer 14

Can affect all or part of the prostate.

Question 15

Is enlargement of the prostate benign or malignant?

Answer 15

Can be either.

Question 16

Where does lymph from the testicles drain to?

Answer 16

Aortic nodes at root of testicular artery.

Question 17

Where does lymph from the skin of the penis and wall of the scrotum drain to?

Answer 17

Superficial inguinal nodes.

Question 18

What is the anal triangle?

Answer 18

Posterior half of the perineum.

Question 19

What are the boundaries of the anal triangle?

Answer 19

The coccyx, sacrotuberous ligaments, and a theoretical line between the ischial tuberosities.

Question 20

What forms the walls of the ischioanal (Rectal) fossa?

Answer 20

Ischial tuberostiy rectal/anal canal.

Question 21

What forms the roof of the ischioanal (Rectal) fossa?

Answer 21

Levator ani (pelvic diaphragm).

Question 22

What forms the floor of the ischioanal (Rectal) fossa?

Answer 22

Skin.

Question 23

What does the ischioanal (Rectal) fossa contain?

Answer 23

Branches of the pudendal nerve, artery, vein, and adipose tissue.

Question 24

What is the anal canal?

Answer 24

Terminal segment of the large intestine between the rectum and anus, below the level of the pelvic diaphragm.

Question 25

What kind of muscle is the external anal sphincter?

Answer 25

Skeletal muscle.

Question 26

What is the external anal sphincter attached to?

Answer 26

The muscle enters into the perineal body and attached to the anococcygeal ligament.

Question 27

What is the function of the external anal sphincter?

Answer 27

Closes the anus, rectal control aided by the puborectalis.

Question 28

What is the nervous supply of the external anal sphincter?

Answer 28

Pudendal nerve (S2-4), inferior rectal branch.

Question 29

What is the arterial supply of the rectum and anus?

Answer 29

Superior, middle and inferior rectal arteries, and the internal pudendal artery.

Question 30

Where does lymph superior to the pectinate line drain to?

Answer 30

Internal iliac nodes.

Question 31

Where does lymph inferior to the pectinate line drain to?

Answer 31

Superficial inguinal nodes.

Question 32

What type of nerve fibres innervate superior to the pectinate line?

Answer 32

Visceral motor (mixed sympathetic and parasympathetic) and sensory.

Question 33

What type of nerve fibres innervate inferior to the pectinate line?

Answer 33

Somatic motor and sensory.