Male Anatomy

Question 1

erectile tissues making up penis

Answer 1

corpus spongiosum (corpus cavernosum urethra)
2 corpora cavernosa

Question 2

corpus spongiosum

Answer 2

“corpus cavernosum urethra”
along midline
- contains urethra as it pierces UG diaphragm - known as spongy penile urethra
- enlarges at distal end to form glans penis
- has limited erectile function

Question 3

corpora cavernosa

Answer 3

two that form the crura of the penis

arise from ischiopubic rami adjactent to UG diaphragm

Question 4

tunica albuginae

Answer 4

“white coat”

- CT that invests each erectile body seperately

Question 5

fundiform ligament

Answer 5

• thickening of scarpa’s fascia
• inserts into superficial fascia Colle’s fascia of penis
• forms anterior support of penis: more superficial layer

Question 6

suspensory ligament of penis

Answer 6

• deep fascial layer that hangs from pubic symphysis
• arises from lower end of linea alba
• inserts onto Buck’s fascia of penis

Question 7

bulbospongiosus muscle

Answer 7

covers bulb of penis
“compressor of the urethrae” - when it contracts, it constricts the urethra allowing for propulsion of sperm during ejactulation
- seperated from corpus spongiosum via Buck’s fascia

Question 8

ischiovacernosus m.

Answer 8

covers wings of corpus cavernosum, contraction pulls penis into erect position
“erector of penis”
- seperated from corpora cavernosa via Buck’s fascia

Question 9

superficial transverse perineal muscle

Answer 9

• borders the posterior edge of the UG diaphragm
• originates from ischiopubic rami
• inserts on central tendon of the perineum

Question 10

tunica vaginalis

Answer 10

serous covering of testes

derived from processus vaginalis

Question 11

tunica albuginae in testes

Answer 11

dense CT that divides the organ into lobules

• each lobule contains: convoluted seminiferous tubule, straight ST, and rete testis
• lobules come together in mediastinal area

Question 12

epidiymis

Answer 12

• place where sperm gain motility

- divided into head, body/tail and caudal portion

Question 13

Layers of testes

Answer 13

1. deepest: visceral layer of tunica vaginalis
2. internal spermatic fascia
3. cremasteric m and fascia
4. external spermatic fascia
5. Dartos
6. external: skin

Question 14

epididymis

Answer 14

where sperm gain motility

• head: individual lobules and a single uniting duct
• body/tail: epididymil duct
• caudal portion: leads into ductus deferens

Question 15

ductus deferens

Answer 15

• continuation of epididymal duct
• passes through the inguinal canal to enter the pelvis
• converges with opposite duct posterior to the bladder
• strong muscular body, functions in ejactulation

Question 16

ejaculatory duct

Answer 16

constriction of ductus deferens as duct enters prostate gland

Question 17

seminal vesicles

Answer 17

• arise from blind pouches from the ductus deferens

- functionally these are sex glands (secrete alkaline fluid to add to the semen)

Question 18

ejaculatory ducts

Answer 18

starts at the junction with the seminal vesicle

- courses through the prostate to prostatic urethra

Question 19

prostate gland

Answer 19

• located between levatory ani m. and base of bladder
• adult structure has two lobes:
  1. middle: above the ejactulatory duct
  2. posterior: below the ejaculatory duct

Question 20

prostatic urethra

Answer 20

extends from neck of bladder to membranous urethra

- prostate opens into urethra along two lateral grooves known as prostatic sinuses

Question 21

Blood supply to testis/epididymis?

Answer 21

testicular artery and vein - pampiniform plexus

Question 22

blood supply to ducutus deferens?

Answer 22

deferential a. and v. back to base of bladder

Question 23

blood supply to prostate?

Answer 23

inferior vesicle a. (and maybe middle rectal or internal iliac a)

two sets of aa:

• capsular branches: supply main portion of gland
• urethral a. supplies prostatic urethra and adjacent tissue

two sets of vv:

• prostatic plexus drains anterior lateral portion of gland
• vesical plexus drains to base of bladder