Bladder Flashcards
What is the minimum amount of urine in the bladder at all times?
50ml
How many layers of smooth muscle does the bladder have?
3
What are the three layers called?
Internal, middle and external
What name is given to the muscle of the bladder?
Detrusor muscle
Which layers of muscle have similar longitudinal alignment?
Internal and external
Which layer is roughly circular?
The middle layer
What cells line the bladder?
epithelium, transitional epithelium or urothelium (all correct)
What properties do the urothelium cells have?
Stretchy, flatten and stretch over one another
How many cells thick is an empty bladder?
5-6
How many cells thick is a distended bladder?
2-3
What type of cells is the basal layer of urothelium?
Cuboidal
What type of cells is the middle layer of urothelium?
Polygonal
What type of cells are the surface layer of the urothelium?
Tall columnar
Describe the adult empty bladder anatomy?
Anterior in the lesser pelvis, inferior to the peritoneum.
How does the location of the bladder change when it is full?
It extends superiorly into the extraperitoneal fat of the anterior body wall
Where is the bladder in children?
In the abdomen
What is the name of the smooth triangle that sits between the two ureteric orifices called?
Trigone
Where is the trigone located?
Inside the bladder on the posterior wall between the ureteric orifices.
What is the region of the trigone called when the bladder is empty?
The rugae ridges
Which sex has the internal urethral sphincter?
Males- it stops semen coming into the bladder
Where is the internal urethral sphincter?
At the junction between the bladder and the urethra
What sort of control is the internal urethral sphincter under?
Autonomic control
What is the skeletal muscle sphincter called?
External urethral sphincter
What sort of control is the external urethral sphincter under?
Voluntary
