The Urogenital Triangle

Question 1

Answer 1

Question 2

what are the three parts of the male urethra called?

Answer 2

1. prostatic
2. membranous
3. penile (spongy)

Question 3

which are the widest and narrowest parts of the male urethra?

Answer 3

widest part - prostatic
narrowest part - membranous

Question 4

what is the highlighted muscle of the penis called?

Answer 4

• left and right corpora cavernosa

Question 5

Along the urethral surface there is a wide, shallow, longitudinal groove between the paired corpora cavernosa along which runs the?

Answer 5

corpus spongiosum

Question 6

The urethra runs through the center of the ? to the external urethral orifice in the tip of the glans penis.

Answer 6

corpus spongiosum

Question 7

the corpus cavernosa is covered by a fascial layer called the?

Answer 7

tunica albuginea

Question 8

what is the sensory innervation of the penis?

Answer 8

dorsal nerve of the penis, a branch of pudendal nerve

Question 9

where is the internal/vesical urethral sphincter located?
is it voluntary or involuntary? whats its innervation?

Answer 9

bladder neck
- involuntary innervated by: sympathetic - hypogastric (T12-L2) and parasympathic - pelvic S2-S4

Question 10

where is the external urethral sphincter found in females?

Answer 10

bladders distal inferior end

Question 11

where is the external urethral sphincter found in males?

Answer 11

inferior to prostate

Question 12

is the external urethral sphincter voluntary or involuntary? whats its innervation?

Answer 12

• voluntarily innervated by: somatic - pudendal S2-S4

Question 13

what is the collective name for the female external genitalia?

Answer 13

vulva

Question 14

what is the vulva composed of?
and what innervates it?

Answer 14

1. mons pubis
2. labia majora
3. labia minora
4. vestibule
5. Bartholin’s gland
6. clitoris

• collectively supplied by the pudendal nerve, and internal pudendal artery

Question 15

what is the vestibule (female external genitalia)?

Answer 15

• the area enclosed by the labia minora and contains the terminal aspects of the vagina and urethra

Question 16

describe the structure of the clitoris

Answer 16

• it is comprised of 2 crura, which meet in the midline to form the body
• this then projects downwards to the prepuce and glans which lies in the anterior labial commisure.