urine storage ureters: muscular tubes that are about 25cm long and connect the kidney to the bladder...
Post on 03-Jan-2016
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Urine Storage
Ureters: muscular tubes that are about 25cm long and connect the kidney to the bladder
Layers 2 smooth muscle, 1 connective Urine enters the ureters causing it to stretch
which stimulates the surrounding smooth muscle to start a peristaltic wave to push urine to bladder
Bladder
Is muscular sac that holds urine The bladder has rugae or wrinkles that stretch
due to urine pressure Stretch receptors reach threshold and send a
message to the brain to cause urge to void
Urethra
A thin walled tube that starts with the internal urethral sphincter and is caped with the external urethral sphincter
Only the external urethral sphincter can be voluntarily controlled
Voiding The process of voiding urine is called
micturition This process is controlled by the sympathetic
nervous system The bladder is told to constrict by the CNS as
the interior and exterior urethral sphincters are told to relax
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