Relations of Urinary Bladder

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Questions and Answers

What is the ligament that connects the bladder neck to the pubic bone in females?

Pubovesical ligament (correct)

Puboprostatic ligament

Uterovesical ligament

Urethral ligament

What is the structure that separates the inferolateral surfaces of the bladder from the back of the pubis and obturator internus?

Urogenital diaphragm

Levator ani

Retro-pubic fat (correct)

Vesical venous plexus

What is the relation of the superior surface of the bladder in females?

Related to coils of small intestine and sigmoid colon

Covered with peritoneum and related to the uterus (correct)

Related to the anterior surface of the uterus

Related to the vesical venous plexus

What is the function of the muscular coat (detruser muscle) in the urinary bladder wall?

To form the internal urethral sphincter Signup and view all the answers

What is the boundary of the trigone in the urinary bladder?

2 ureteric orifices above and the internal urethral orifice below Signup and view all the answers

What is the source of the superior vesical artery in the urinary bladder?

Proximal part of the obliterated umbilical artery Signup and view all the answers

What is the drainage route of the vesical veins in the urinary bladder?

Internal iliac vein Signup and view all the answers

What is the length of the female urethra?

About 4 cm long Signup and view all the answers

Where is the urinary bladder located at birth?

Abdominal cavity Signup and view all the answers

What is the shape of the urinary bladder?

3-sided pyramid Signup and view all the answers

What is the direction of the superior surface of the urinary bladder?

Upward Signup and view all the answers

What is the relation of the posterior surface of the urinary bladder to the rectum in males?

Separated by the rectovesical fascia Signup and view all the answers

What is the relation of the bladder neck to the prostate gland in males?

Rests on the prostate gland Signup and view all the answers

What is the relation of the posterior surface of the urinary bladder to the cervix and vagina in females?

In direct contact Signup and view all the answers

What is the direction of the apex of the urinary bladder?

Anteriorly Signup and view all the answers

Where do the ureters enter the urinary bladder from?

Superolateral angles Signup and view all the answers

Where does the female urethra begin?

At the neck of the bladder Signup and view all the answers

What is the length of the male urethra?

8 inches Signup and view all the answers

How many parts does the male urethra have?

4 Signup and view all the answers

Where does the prostatic urethra enter?

The prostate via its base Signup and view all the answers

What is the narrowest part of the male urethra?

The external urethral meatus Signup and view all the answers

What structure surrounds the membranous urethra?

Pelvic fascia and perineal membrane Signup and view all the answers

What is the fossa terminalis also known as?

Navicularis Signup and view all the answers

What is the name of the glands that open into the penile urethra?

Cowper's glands Signup and view all the answers

Study Notes

Urinary Bladder

Site: in pelvic cavity in adults, in abdominal cavity at birth and in pelvic-abdominal cavity in children
Shape: 3-sided pyramid with apex anteriorly, base posteriorly, superior surface upward, and neck inferiorly
Parts: apex, base, superior surface, neck, and 2 lateral surfaces
Relations of posterior surface (base): ureters enter from superolateral angles in both sexes
Relations of posterior surface (base) in male: covered by peritoneum, related to seminal vesicles and ampulla of vas deferens, separated from rectum by rectovesical fascia
Relations of posterior surface (base) in female: lies in direct contact with anterior walls of cervix and vagina

Ligaments of Urinary Bladder

Puboprostatic ligament in males
Pubovesical ligament in females
Urogenital diaphragm

Interior of Urinary Bladder

Muscular coat (detrusor muscle) with thickened internal urethral sphincter
Mucosa with folds (disappear in full bladder) except trigone, which is smooth
Trigone: triangular area lining base of bladder, bounded by 2 ureteric orifices and internal urethral orifice

Blood Supply, Venous Drainage, and Nerve Supply

Blood supply: superior vesical artery from proximal part of obliterated umbilical artery and inferior vesical artery (only in males)
Venous drainage: vesical veins form a plexus on the inferolateral surface of the bladder, draining into internal iliac vein
Nerve supply: autonomic fibers from inferior hypogastric plexus

Female Urethra

Length: approximately 4 cm
Begins at the neck of the bladder, travels a slightly curved course, and ends by opening in the vestibule anterior to the vaginal opening

Male Urethra

Length: approximately 20 cm
Extends from internal urethral meatus to external urethral meatus
Parts: preprostatic urethra, prostatic urethra, membranous urethra, and penile urethra
Prostatic urethra: 3 cm long, enters the prostate via the center of its base, and leaves the prostate just above its apex
Membranous urethra: 1 cm long, narrowest part, lies in the deep perineal pouch between pelvic fascia and perineal membrane
Penile urethra: 15 cm long, traverses the corpus spongiosum of the penis

Sphincter Urethrae and Bulbo-Urethral (Cowper’s) Glands

Sphincter urethrae: surrounding the membranous urethra
Bulbo-urethral (Cowper’s) glands: surrounding the penile urethra, ducts pierce the perineal membrane to open into the penile urethra

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Description

This quiz covers the anatomical relationships of the urinary bladder, including its connections to the pubic bone and surrounding structures in both males and females.