Anatomy of Urethral Arterial Supply

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Which statement about the location of the urinary bladder is correct?

As the bladder fills, it descends from the greater pelvis towards the umbilicus. (correct)

In adults, the superior surface is level with the inferior margin of the pubic symphysis.

In adults, it is located in the greater pelvis, anterior to the pubic bone.

In infants and young children, it is located entirely in the lesser pelvis.

What is the shape of the empty urinary bladder?

Cylindrical

Pyramidal (correct)

Spherical

Conical

Which of the following is NOT a function of the urinary bladder?

Varying in size, shape, position, and relations

Responding to its content and the state of neighboring viscera

Concentrating urine (correct)

Temporarily storing urine

Which statement about the relations of the urinary bladder is correct?

In females, it is posterior to the pubic symphysis. Signup and view all the answers

At what age does the urinary bladder enter the lesser pelvis?

At age 6 Signup and view all the answers

Which statement about the variation in the urinary bladder is correct?

It varies in size, shape, position, and relations based on its content and neighboring viscera. Signup and view all the answers

Which of the following structures is NOT directly related to the urinary bladder in males?

Uterus Signup and view all the answers

What is the primary function of the detrusor muscle in the urinary bladder?

To expel urine Signup and view all the answers

In females, which structure is located between the urinary bladder and the rectum?

Rectouterine pouch (of Douglas) Signup and view all the answers

Which of the following statements about the urinary bladder is FALSE?

The neck of the bladder is held in position by the puboprostatic ligament in males. Signup and view all the answers

What is the function of the trigone in the interior of the urinary bladder?

It is a smooth area where the ureters and urethra enter the bladder. Signup and view all the answers

What is the location of the lacuna magna (sinus of Guerin)?

Roof of fossa navicularis Signup and view all the answers

Which of the following structures directly borders the inferolateral surfaces of the urinary bladder in both males and females?

Pubis and obturator internus muscle Signup and view all the answers

What type of tissue makes up the female urethra?

Distensible muscular tube with elastic and smooth muscle tissue Signup and view all the answers

Where does the female urethra begin?

At the internal urethral orifice Signup and view all the answers

Which structures open into the female urethra?

Paraurethral glands of Skene Signup and view all the answers

What is the relation of the external urethral orifice to the pubic symphysis?

1 cm behind it Signup and view all the answers

Which artery primarily supplies the base of the bladder and the trigone region?

Inferior vesical artery Signup and view all the answers

In females, which arteries replace the function of the inferior vesical artery in supplying blood to the bladder?

Uterine and vaginal arteries Signup and view all the answers

What is the primary venous drainage pathway for the bladder?

Vesical venous plexus draining into the internal iliac vein Signup and view all the answers

Which of the following statements about the lymphatic drainage of the bladder is correct?

Lymph vessels from the inferolateral surface join those from the superior surface and drain to the external iliac nodes Signup and view all the answers

Which nerve plexus is responsible for the motor innervation of the detrusor muscle and inhibitory innervation of the sphincter vesicae?

Parasympathetic component (nervi erigentes S2-S4) of the vesical nerve plexus Signup and view all the answers

Which part of the male urethra is the widest and most dilatable?

Prostatic urethra Signup and view all the answers

Which of the following statements about the internal sphincter of the bladder is correct?

It is a circular smooth muscle at the neck of the bladder innervated by the autonomic nervous system. Signup and view all the answers

Which of the following arteries supply the male urethra?

Both A and B. Signup and view all the answers

Which of the following statements about the venous drainage of the male urethra is correct?

The posterior urethra drains into the prostatic and vesical venous plexuses, which drain into the internal iliac vein. Signup and view all the answers

Which of the following statements about the lymphatic drainage of the male urethra is correct?

The entire urethra drains into the internal iliac nodes, with some vessels ending in the external iliac nodes. Signup and view all the answers

Which of the following statements about the nerve supply to the urethra is correct?

Both A and B are correct. Signup and view all the answers

Which of the following statements about the arterial supply to the female urethra is correct?

The female urethra is supplied by the vaginal and internal pudendal arteries. Signup and view all the answers