Anatomy of bladder

Question 1

Which body region is the bladder located in?

Answer 1

Pelvis

Question 2

Where in the pelvis is the bladder located?

Answer 2

Posteriorly to pubic bones

In males, antero-superiorly to prostate gland
In females, anteriorly to vagina

Question 3

How does the bladder relate to the peritoneum?

Answer 3

Inferiorly to the peritoneum

Question 4

What is the bladder wall made up of?

Answer 4

Smooth muscle fibres oriented in different directions

called bladder detrusor muscle

Question 5

What are the parts of the bladder?

Answer 5

Apex

Body

Fundus

Neck

Question 6

What is the apex of the bladder?

Answer 6

Superior part of bladder that points to the pubic symphysis

Question 7

What is the body of the bladder?

Answer 7

Middle part of bladder

Question 8

What is the fundus of the bladder?

Answer 8

Posterior part of bladder

Question 9

What is the neck of the bladder?

Answer 9

Inferior part of bladder

where fundus and inferolateral surfaces of bladder converge

Question 10

What shape is the bladder when it’s empty?

Answer 10

Tetrahedral

Question 11

What are the surfaces of the bladder when it’s empty?

Answer 11

Superior

Posterior

Inferolateral x2

Question 12

What is the function of the bladder?

Answer 12

Temporary storage of urine

Assist with expulsion of urine

Question 13

How is the bladder adapted to storing urine?

Answer 13

It is hollow

Its walls are distensible

Question 14

How is the bladder adapted to expulsing urine?

Answer 14

The musculature of the bladder contracts

The sphincters relax

Question 15

How does urine enter the bladder?

Answer 15

Via the ureters

Question 16

Where does urine leave the bladder?

Answer 16

Internal urethral orifice

Question 17

What part of the bladder contains the openings for the ureters and the internal urethral orifice?

Answer 17

Fundus of bladder

Question 18

What is the trigone of the bladder?

Answer 18

Triangle formed by the openings for the ureters superiorly, and the internal urethral orifice inferiorly, in the fundus of the bladder

Question 19

How does the surface of the trigone compare to the rest of the bladder?

Answer 19

Surface of trigone is smooth

rest of surface of bladder is folded

Question 20

What structures control the release of urine from the bladder?

Answer 20

Internal urethral sphincter

External urethral sphincter

Question 21

Where is the internal urethral sphincter located?

Answer 21

At the neck of the bladder

proximal part of urethra

Question 22

What is the internal urethral sphincter made up of?

Answer 22

In males, circular smooth muscle fibres

In females, smooth muscle of bladder neck and proximal urethra themselves

Question 23

Where is the external urethral sphincter located?

Answer 23

In males, inferiorly to the prostate gland around the membranous urethra

Question 24

What is the external urethral sphincter made up of?

Answer 24

Skeletal muscle

Question 25

What happens to the shape of the bladder as it fills with urine?

Answer 25

Becomes more spherical

Question 26

What happens to the position of the bladder as it fills with urine?

Answer 26

It superior surface ascends