The urinary bladder is situated in the anterior part of the lesser pelvis immediately behind the pubic symphysis and in front of the rectum in males and uterus in the female They attach onto the bladder wall at the lateral vesical folds.The urinary bladder is a muscular reservoir of urine, lying in the anterior part of the pelvis.Within them are the residual umbilical vessels which still have some patency and convey small amounts of blood to the cranial bladder.Function - retain urine through increased urethral tone External Urethral Sphincter This third component is more appropriately included in the anatomy section of the.Sympathetic Supply - Internal Urethral Sphincter However, unlike the detrusor its innervation is purely from sympathetic fibres. Allows bladder filling Internal Urethral Sphincter A thickening of the bladder musculature found at the neck of the bladder which is continuous with the detrusor and is therefore smooth muscle.Syanpse in caudal mesenteric ganglion - bladder wall.Function - empty bladder Sympathetic Supply - Detrusor Muscle.
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