Changes

=== Muscles ===

=== Muscles ===

The bladder wall contains a muscle called the [[detrusor muscle]]. One's bladder fills up when the detrusor muscle relaxes; when the bladder fills, the bladder expands to accommodate urine. Urination is done by contracting the muscle. Contracting the detrusor muscle causes urination, because the action makes the bladder smaller, squeezing urine out. <ref>http://www.netdoctor.co.uk/womenshealth/sui/bladder_005149.htm</ref>

The bladder wall contains a muscle called the [[detrusor muscle]]. One's bladder fills up when the detrusor muscle relaxes; when the bladder fills, it expands to accommodate urine. Urination is done by contracting the muscle. Contracting the detrusor muscle causes urination, because the action makes the bladder smaller, squeezing urine out. <ref>http://www.netdoctor.co.uk/womenshealth/sui/bladder_005149.htm</ref>

==See Also==

==See Also==