Male Pelvis/Perineum

Question 1

What is the anatomical name for the anal triangle?

Answer 1

Ischioanal fossa

Question 2

What is the membraneous layer of superficial perineal fascia in the urogenital triangle?

Answer 2

Colles’ fascia

Question 3

What fascia invests the muscles of the perineum?

Answer 3

Investing or Gallaudet’s

Question 4

What fascia layer continues onto the erectile tissue of the penis?

Answer 4

Buck’s

Question 5

What muscle makes up the ventral most side of the penis?

Answer 5

Corpus spongiosum

Question 6

The crura of the penis become what muscle more distally?

Answer 6

Corpora cavernosa

Question 7

What are the boundaries of the superficial perineal pouch?

Answer 7

Superior-perineal membrane; Inferior- Colles’ fascia; lateral- ischiopubic rami

Question 8

What are the contents of the male superficial perineal pouch?

Answer 8

Bulb of penis, crura of penis, ischiocavernosus mm., bulbospongiosus m., superficial transverse perineus mm., proximal part (bulb) of spongy urethra, deep and superficial perineal branches of internal pudendal vessels and pudendal n.

Question 9

What is the thickened anterior border of the perineal membrane?

Answer 9

Transverse perineal ligament

Question 10

What are the boundaries of the deep perineal pouch?

Answer 10

Superior- superior fasia of UG diaphragm; inferior- perineal membrane; lateral- inf. Portion of obturator internus m. w/ its fascia

Question 11

What are the contents of the male deep perineal pouch?

Answer 11

Membranous (intermediate) part of urethra, external urethral sphincter m., deep transverse sphincter m., bulbourethral glands, deep perineal branches of the internal pudendal vessels and the pudendal n., dorsal a. and n. of penis

Question 12

What makes up the urogenital diaphragm?

Answer 12

Superior fascia of urogenital diaphragm, sphincter urethrae m. and transverse perinei mm., bulbourethral glands (men), perineal membrane?

Question 13

What spinal nerves make up the pudendal n?

Answer 13

S2, S3, S4

Question 14

What are the branches of the pudendal n. within the pelvis/perineum?

Answer 14

Inferior rectal n., perineal (superficial and deep branches), dorsal nerve of penis (clitoris)

Question 15

What supplies blood to the scrotum?

Answer 15

Posterior scrotal brs. of perineal a.; anterior scrotal branches of deep external pudendal a.; cremasteric a.

Question 16

What nerves innervate the scrotum?

Answer 16

Genital br of genitofemoral n., anterior scrotal brs. Of ilioinguinal n., posterior scrotal branches of perineal branch of pudendal n., perineal brs. Of the posterior cutaneous n. of the thigh

Question 17

What is the peritoneal space between the bladder and rectum in men?

Answer 17

Rectovesical pouch

Question 18

What is the relationship of the ureter to the testicular vessels at the pelvic brim?

Answer 18

Ureters are more medial than the vessels

Question 19

What are the three most common sites for kidney stones to lodge?

Answer 19

Uretopelvic junction, crossing iliac a./v., ureterovesical junction

Question 20

Approximately what is the capacity of a full bladder?

Answer 20

500 mL

Question 21

What muscle composes the walls of the bladder?

Answer 21

Detrusor m.

Question 22

What are the three sections of the male urethra?

Answer 22

Prostatic, membraous, penile (spongy)

Question 23

Into what specific area of the urethra does the prostate secrete?

Answer 23

Prostatic sinus

Question 24

Which openings are found on the seminal colliculus?

Answer 24

Prostatic utricle and openings of ejaculatory duct

Question 25

Through what does the seminal vesicle secrete into the urethra?

Answer 25

Ejactulatory duct

Question 26

What is the function of the paraurethral glands?

Answer 26

Secrete mucous in the urethra

Question 27

What empties into the ejactulatory duct?

Answer 27

Seminal vesicles and vas deferens

Question 28

What are the lobes of the prostate gland?

Answer 28

Anterior, Posterior, Median, 2 Lateral

Question 29

Which lobe of the prostate is fibromuscular?

Answer 29

Anterior lobe

Question 30

What is the most frequent site of prostatic cancer?

Answer 30

Posterior Lobe

Question 31

What is included in prostatic secretions?

Answer 31

Prostaglandins, citrates, acid phosphatase, PSA

Question 32

Which lobe is affected most by benign prostatic hypertrophy?

Answer 32

Median lobe

Question 33

What structure secretes most of semen's volume?

Answer 33

Seminal vesicles

Question 34

What is the pathway of sperm out of the penis?

Answer 34

Seminiferous tubules-->efferent ductules-->vas deferens--> ampulla of vas deferens--> ejaculatory duct--> prostatic urethra--> spongy urethra--> fossa navicularis --> external urethral orifice

Question 35

What are the contents of the spermatic cord?

Answer 35

Vas deferens, testicular a., a. of vas deferens, cremasteric a., pampiniform venous plexus, autonomic nerve fibers, GVAs, genital branch of genitofemoral n., lymphatics

Question 36

What portion of the anal canal is derived from endoderm?

Answer 36

Upper 2/3

Question 37

What are the longitudinal folds of mucosa in upper 2/3 of anus containing terminal brs. Of superior rectal a. and v.

Answer 37

Anal columns

Question 38

What anal sphincter is under ANS control?

Answer 38

Internal

Question 39

What vessel supplies the corpus cavernosum m.?

Answer 39

Deep a. of penis

Question 40

What is the normal pathway of venous drainage from the prostate?

Answer 40

Prostatic venous plexus--> internal iliac v. --> common iliac v. --> inferior vena cava

Question 41

Through what vessels is it possible for venous drainage from the prostate to enter the internal vertebral venous plexus?

Answer 41

Lateral sacral vv.

Question 42

What is the most lateral of the neurovascular structures on the dorsum of the penis?

Answer 42

Dorsal n. of penis

Question 43

What ligament attaches to the apex of the bladder?

Answer 43

Median umbilical ligament

Question 44

What is the name of rectoprostatic fascia?

Answer 44

Denonvilliers' fascia

Question 45

What seperates the median and posterior lobes of the prostate?

Answer 45

Ejaculatory duct

Question 46

What is the function of th builbourethral glands? What is their homolog in females?

Answer 46

Mucous secreting glands that help lubricate the urethra during sexual arousal; Vestibular glands

Question 47

What boundary seperates the Anal triangle from the UG triangle?

Answer 47

Imaginary line between ischial tuberosities

Question 48

In what fascial compartment does the pudendal n. course along the obturator internus m.?

Answer 48

Alcock's canal

Question 49

Which two muscles tied into the perineal body are responsible for maintaining erections by clampin off veinous drainage?

Answer 49

Ischiocavernosus and bulbospongiosus mm.

Question 50

What are the three functions of the bulbospongiosus m?

Answer 50

Increase turgidity of the penis by pushing blood to distal end; Gets last drop of urine out; maintains erection

Question 51

What structures make up the root of the penis?

Answer 51

Bulb and crura of the penis

Question 52

To what are the crura of the penis/clitoris attached?

Answer 52

Ischiopubic rami