6. Perineal Space in MALE

Question 1

Identify

Answer 1

1. External urethral sphincter muscle (male)
2. Deep transverse perineal muscle
3. Bulbourethral (Cowper’s) gland

Question 2

Identify 1. O & I

Answer 2

1. External urethral sphincter muscle (male)

Origin: External urethral sphincter muscle arises from the ischiopubic ramus.

Insertion: Inserts into a median raphe and the perineal body and extends superoanteriorly along the prostate to the neck of the urinary bladder.

Question 3

Identify 1. Action

Answer 3

1. External urethral sphincter muscle (male)

Action: Acting together, the urethral sphincter muscles on both sides form a sphincter that compresses the membranous portion of the male urethra.

Question 4

Identify 1. Innervation

Answer 4

1. External urethral sphincter muscle (male)

Innervation: Perineal branch of the pudendal nerve (S2-S4).

Question 5

At the neck of the male urinary bladder,___ exists that is important during ejaculation

→ because it prevents semen from entering the urinary bladder or urine from entering the prostatic urethra.

Answer 5

an internal urethral sphincter (smooth muscle, sympathetically innervated from L1-L2)

Question 6

Does female posses internal urethra muscle?

Answer 6

women do NOT possess an internal urethral sphincter (smooth muscle sphincter at the neck of the urinary bladder), which is a sphincter muscle found only in men.