Urinary bladder

bladderfundusintravesicalbladder neckbladdersfundus of theNeck of the urinary bladderapexbladder failurecow bladders
The urinary bladder is a hollow muscular organ in humans and some other animals that collects and stores urine from the kidneys before disposal by urination.wikipedia
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Urine

urinaryhuman urinepiss
The urinary bladder is a hollow muscular organ in humans and some other animals that collects and stores urine from the kidneys before disposal by urination.
Urine flows from the kidneys through the ureters to the urinary bladder.

Urination

urinateurinatingmicturition
The urinary bladder is a hollow muscular organ in humans and some other animals that collects and stores urine from the kidneys before disposal by urination.
Urination is the release of urine from the urinary bladder through the urethra to the outside of the body.

Kidney

kidneysrenalrenal circulation
The urinary bladder is a hollow muscular organ in humans and some other animals that collects and stores urine from the kidneys before disposal by urination.
Each kidney is attached to a ureter, a tube that carries excreted urine to the bladder.

Urethra

male urethraurethralfemale urethra
Urine enters the bladder via the ureters and exits via the urethra.
In anatomy, the urethra (from Greek οὐρήθρα – ourḗthrā) is a tube that connects the urinary bladder to the urinary meatus for the removal of urine from the body.

Pubic symphysis

symphysis pubisarcuate pubic ligamentsymphysis
The apex (prev.vertex) is directed forward toward the upper part of the pubic symphysis, and from there the median umbilical ligament continues upward on the back of the anterior abdominal wall to the umbilicus.
It is located in front of and below the urinary bladder.

Muscle

musclesmuscularmusculature
In the human the bladder is a hollow muscular, and distensible (or elastic) organ, that sits on the pelvic floor.
Smooth muscle or "involuntary muscle" is found within the walls of organs and structures such as the esophagus, stomach, intestines, bronchi, uterus, urethra, bladder, blood vessels, and the arrector pili in the skin (in which it controls erection of body hair). Unlike skeletal muscle, smooth muscle is not under conscious control.

Vesicoureteral reflux

refluxreflux uropathyvesico-ureteral reflux
These openings have mucosal flaps in front of them that act as valves in preventing the backflow of urine into the ureters, known as vesicoureteral reflux.
Vesicoureteral reflux (VUR), also known as vesicoureteric reflux, is a condition in which urine flows retrograde, or backward, from the bladder into the ureters/kidneys.

Smooth muscle

smooth muscle cellssmooth musclessmooth muscle cell
The trigone is a smooth-muscle area that forms the floor of the bladder above the urethra. The detrusor muscle is a layer of the urinary bladder wall made of smooth muscle fibers arranged in spiral, longitudinal, and circular bundles.
Smooth muscle cells are found in the walls of hollow organs, including the stomach, intestines, urinary bladder and uterus, and in the walls of passageways, such as the arteries and veins of the circulatory system, and the tracts of the respiratory, urinary, and reproductive systems.

Umbilical folds

middle umbilical fold
The peritoneum is carried by it from the apex on to the abdominal wall to form the middle umbilical fold.
Related to the urinary bladder, anteriorly there are the following folds:

Peritoneum

peritonealintraperitonealparietal peritoneum
The peritoneum is carried by it from the apex on to the abdominal wall to form the middle umbilical fold.
The structures within the intraperitoneal space are called "intraperitoneal" (e.g., the stomach and intestines), the structures in the abdominal cavity that are located behind the intraperitoneal space are called "retroperitoneal" (e.g., the kidneys), and those structures below the intraperitoneal space are called "subperitoneal" or "infraperitoneal" (e.g., the bladder).

Trigone of urinary bladder

trigonetrigone of the bladderbladder trigone
The three openings, two ureteric orifices, and the internal urethral orifice mark the triangular area called the trigone of the bladder.
The trigone (a.k.a. vesical trigone) is a smooth triangular region of the internal urinary bladder formed by the two ureteric orifices and the internal urethral orifice.

Internal urethral orifice

internalurethral meatusurethral orifice
The neck of the bladder is the area at the base of the trigone that surrounds the internal urethral orifice that leads to the urethra.
The internal urethral orifice is the opening of the urinary bladder into the urethra.

Uterus

wombuterineuteri
In women, it lies in front of the uterus, separated by the vesico-uterine pouch, and is supported by the elevator ani and the upper part of the vagina.
The uterus is located within the pelvic region immediately behind and almost overlying the bladder, and in front of the sigmoid colon.

Prostate

prostate glandprostaticventral prostate
In males the neck of the urinary bladder is adjacent to the prostate gland.
The prostate surrounds the urethra just below the urinary bladder and can be felt during a rectal exam.

Recto-vesical pouch

rectovesicalrectovesical excavationrectovesical pouch
In men, it lies in front of the rectum, separated by the recto-vesical pouch, and is supported by fibres of the levator ani and of the prostate gland.
The recto-vesical pouch is the pocket that lies between the rectum and the urinary bladder in human males and other male mammals.

Transitional epithelium

urotheliumurothelialuroepithelial
The inner side of the bladder is lined with a mucosal membrane consisting of a surface glycocalyx that protects the cells beneath it from urine, the urothelium (a form of transitional epithelium), a basement membrane, and the lamina propria.
Transitional epithelium lines the organs of the urinary system and is known here as urothelium. The bladder for example has a need for great distension.

Median umbilical ligament

median umbilical fold
The apex (prev.vertex) is directed forward toward the upper part of the pubic symphysis, and from there the median umbilical ligament continues upward on the back of the anterior abdominal wall to the umbilicus.
It extends from the apex of the bladder to the umbilicus, on the deep surface of the anterior abdominal wall.

Pelvic floor

pelvic diaphragmpelvic floor musclespelvic muscles
In the human the bladder is a hollow muscular, and distensible (or elastic) organ, that sits on the pelvic floor.
It is important in providing support for pelvic viscera (organs), e.g. the bladder, intestines, the uterus (in females), and in maintenance of continence as part of the urinary and anal sphincters.

Detrusor muscle

detrusordetrusor urinae muscledetrusor muscles
The detrusor muscle is a layer of the urinary bladder wall made of smooth muscle fibers arranged in spiral, longitudinal, and circular bundles.
The detrusor muscle, also detrusor urinae muscle, muscularis propria of the urinary bladder and (less precise) muscularis propria, is smooth muscle found in the wall of the bladder.

Vesico-uterine pouch

vesicouterine excavationvesicouterine pouch
In women, it lies in front of the uterus, separated by the vesico-uterine pouch, and is supported by the elevator ani and the upper part of the vagina.
In human female anatomy, the vesico-uterine pouch, also known by various other names, is a second but shallower pouch formed from the peritoneum over the uterus and bladder, continued over the intestinal surface and fundus of the uterus onto its vesical surface, which it covers as far as the junction of the body and cervix uteri, and then to the bladder.

Vesical veins

vesicalvesical vein
The Latin phrase for "urinary bladder" is vesica urinaria, and the term vesical or prefix vesico - appear in connection with associated structures such as vesical veins.
The vesical veins are veins in the pelvis that drain blood from the urinary bladder.

Superior vesical artery

superiorsuperior vesical arteries
The superior vesical artery supplies blood to the upper part of the bladder.
The superior vesical artery supplies numerous branches to the upper part of the bladder.

Beta-2 adrenergic receptor

β 2 β 2 -adrenergic receptorβ 2 adrenergic receptor
The main relaxant pathway is via the adenylyl cyclase cAMP pathway, activated by β2 adrenergic receptors.

Inferior vesical artery

inferior
The lower part of the bladder is supplied by the inferior vesical artery in males and by the vaginal artery in females, both of which are branches of the internal iliac arteries.
The inferior vesical artery or inferior vesicle artery is an artery in the pelvis that supplies the lower part of the bladder.

Vaginal artery

vaginal arteries
The lower part of the bladder is supplied by the inferior vesical artery in males and by the vaginal artery in females, both of which are branches of the internal iliac arteries.
The vaginal artery is an artery in females that supplies blood to the vagina and the base of the bladder.