Urethra (23)

Question 1

Urethra

Answer 1

conduit for unrine beginning at the base of the bladder (internal urethral orifice) and terminating externally at the external urethral orifice

Question 2

Urethral Sphincters

Answer 2

Internal Urethral Sphincter - smooth muscle, involuntary

External Urethral Sphincter - skeletal muscle, voluntary

Question 3

Females

Answer 3

Urinary function
Short 4cm - fairly straight

Travels inferiorily along a slight curve through the pelvic floor, perineum, and exits anterior to the vaginal opening in the vestibule

Question 4

Males

Answer 4

Urinary and reproductive function
Long -20cm with 2 major bends

Four partitions:
Preprostatic part - between bladder and prostate
Prostatic part- surrounded by prostate (openings for ejaculatory and male prostatic ducts)
Membranous part - between prostatic and songy parts
Spongy part-surrounded by corpus spongiosum of the penis

Question 5

Arteries- branches off the

Veins (similar names and distributions as arteries)

Answer 5

Internal iliac aa
-internal pudendal aa
-vaginal aa. (female)
-inferior vesicular aa. (males)
-middle rectal aa. (males)