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The lower third of the ureter, closest to the bladder, is supplied by branches from the internal iliac arteries, mainly the superior and inferior vesical arteries. [1] The arterial supply can be variable, with arteries that contribute include the middle rectal artery, branches directly from the aorta, [1] and, in women, the uterine and vaginal ...
The bladder also contains β 3 adrenergic receptors, and pharmacological agonists of this receptor are used to treat overactive bladder. The mucosa of the urinary bladder may herniate through the detrusor muscle. [6] This is most often an acquired condition due to high pressure in the urinary bladder, damage, or existing connective tissue ...
The female or male external sphincter muscle of urethra (sphincter urethrae): located in the deep perineal pouch, at the bladder's distal inferior end in females, and inferior to the prostate (at the level of the membranous urethra) in males. It is a secondary sphincter to control the flow of urine through the urethra.
The middle lobe of the prostate causes an elevation in the mucous membrane behind the internal urethral orifice called the uvula of urinary bladder. The uvula can enlarge when the prostate becomes enlarged. The bladder is located below the peritoneal cavity near the pelvic floor and behind the pubic symphysis.
The inferior ramus of the pubic bone: Insertion: Perineal raphe: Nerve: Sympathetic fibers from T10-L2 through the inferior hypogastric plexus then vesical nervous plexus: Actions: Constricts proximal urethra, maintains urinary continence: Identifiers; Latin: musculus sphincter urethrae internus: TA98: A09.2.03.009 A09.4.02.013: TA2: 3444, 3428 ...
The internal sphincter, formed by the involuntary smooth muscles lining the bladder neck and urethra, receives its nerve supply by the sympathetic division of the autonomic nervous system. [6] The internal sphincter is present both in males and females. [7] [8] [9]
The nerves composing it are numerous, and contain a large proportion of spinal nerve fibers. They accompany the vesicle arteries , and are distributed to the sides and fundus of the bladder . Numerous filaments also pass to the seminal vesicles and vas deferens ; those accompanying the vas deferens join, on the spermatic cord , with branches ...
These vessels enter the prostate on its outer posterior surface where it meets the bladder, and travel forward to the apex of the prostate. [4] Both the inferior vesical and the middle rectal arteries often arise together directly from the internal iliac arteries. On entering the bladder, the inferior vesical artery splits into a urethral ...