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Apex of urinary bladder

Urinary bladder
Urinary system.svg
1. Human urinary system: 2. Kidney, 3. Renal pelvis, 4. Ureter, 5. Urinary bladder, 6. Urethra. (Left side with frontal section)
7. Adrenal gland
Vessels: 8. Renal artery and vein, 9. Inferior vena cava, 10. Abdominal aorta, 11. Common iliac artery and vein
With transparency: 12. Liver, 13. Large intestine, 14. Pelvis
Details
Precursor urogenital sinus
System Urinary system
Artery Superior vesical artery
Inferior vesical artery
Umbilical artery
Vaginal artery
Vein Vesical venous plexus
Nerve Vesical nervous plexus
Identifiers
Latin vesica urinaria
MeSH A05.810.161
Dorlands
/Elsevier
Urinary bladder
TA A08.3.01.001
FMA 15900
Anatomical terminology
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The urinary bladder is a hollow muscular organ in many animals, that collects and stores urine from the kidneys before disposal by urination. In the human the bladder is a hollow muscular, and distensible (or elastic) organ, that sits on the pelvic floor. Urine enters the bladder via the ureters and exits via the urethra. The typical human bladder will hold between 300 and 500 mL (10.14 and 16.91 fl oz) before the urge to empty occurs, but can hold considerably more.

In the human, the bladder is a hollow muscular organ situated at the base of the pelvis. Urine collects in the bladder, fed from the two ureters that are connected to the kidneys. Urine leaves the bladder via the urethra, a single muscular tube which ends in an opening – the urinary meatus, where it exits the body.

Anatomically, the bladder is divided into a broad fundus, a body, an apex, and a neck. The apex (prev.vertex) is directed forward toward the upper part of the pubic symphysis, and from there the median umbilical ligament is continued upward on the back of the anterior abdominal wall to the umbilicus. The peritoneum is carried by it from the apex on to the abdominal wall to form the middle umbilical fold. 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. In the male the neck of the urinary bladder is adjacent to the prostate gland.


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