Urinary System

Question 1

Urinary system consists of…

Answer 1

Ureters
Urethra
Bladder

Question 2

Ureters (3)

Answer 2

• Duct which carries urine from the kidneys to the bladder
• enter the pelvic cavity from the abdomen by passing through the pelvic inlet
• they are crossed by ductus deferens (in men) and uterine artery (in women)

Question 3

Bladder position when

• it is full
• it is empty

Answer 3

• when it is full, it extends superiorly into the abdominal cavity
• when it is empty, it is entirely situated in the pelvic cavity

Question 4

Bladder consists of..

Answer 4

An apex, base, superior surface and two inferolateral surfaces

Apex: toward the top of the pubic symphysis.
Base: ureters enter it and urethra drains from it. Smooth and attaches to the smooth muscle wall.
Inferolateral surfaces: between the two levator ani muscles and the obturator internus

Question 5

What is the trigone in the bladder ?

Answer 5

Smooth triangular area between the openings of the ureters and urethra inside the bladder

Question 6

Inferolateral surfaces of the bladder are between…

Answer 6

the two levator ani muscles and the obturator internus

Question 7

Urethra

Answer 7

Begins at the base of the bladder and ends with an external opening in the perineum

Question 8

Urethra

-Women (4)

Answer 8

• short
• only role is in urination
• it is anterior to the vaginal opening
• it has two small paraurethral mucous glands associated to it.

Question 9

Paraurethral mucous glands (skene’s glands)

Answer 9

Secrete mucus during sexual activity

Question 10

Urethra

-Men (4)

Answer 10

• long
• bends twice along the course
• when penis is flacid, urethra makes another bend and when penis is erect, bend disappears.
• composed of 3 parts: pre-prostatic, prostatic, membranous and spongy.

Question 11

Pre- prostatic part of urethra (3)

Answer 11

• 1 cm long,
• from the bladder to the prostate,
• associated with internal urethral sphincter which prevent retrograde movement of semen.

Question 12

Prostatic part of urethra (6)

Answer 12

• 3-4 cm long
• surrounded by prostate
• lumen of urethra is marked by urethral crest
• urethral crest is enlarged to form the seminal colliculus (near the entrance of the ejaculatory ducts)
• Prostatic utricle opens onto the center of the seminal colliculus
• On each side of the prostatic utricle is the opening of the ejaculatory ducts

Question 13

Connection between the urinary and reproductive tracts in men occurs in which part of the urethra

Answer 13

Prostatic part

Question 14

Membranous part of the urethra (3)

Answer 14

• narrow
• passes through the deep perineal pouch
• during transit urethra is surrounded by the external urethral sphincter muscle

Question 15

Spongy part of the urethra (3)

Answer 15

• surrounded by erectile tissue (corpus spongiosum)
• forms the navicular fossa at the end of the penis
• two bulbourethral glands in the deep perineal pounch open into the spongy urethra