Urinbeschau im Mittelalter
Bladder
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updateted 29.01.2016

Urinary bladder: diaseases, treatment options ...

  • Anatomy and function

    Urinary bladder

    The bladder is a hollow, muscular organ that collects and stores urine. Urine is produced in the kidneys and travels down to the bladder via tubes called ureters. The bladder is from inside lined with a special mucous membrane, the urothelium.
    This mucosa is also found in the renal pelvis, ureters and urethra.
    A significant absorption of liquid or urea in the bladder does not occur.
    It lies to some extent protected in the pelvis.
    Through the urethra, the urine can be drained to the outside.
    The bladder has two sphincter muscles. The internal sphincter is located at the outlet from the bladder and can not be influenced arbitrarily. The outer sphincter is a ring around the urethra and is consciously controlled.

    The bladder of the adult has a maximum capacity of about 1000 ml, however a strong urge to urinate occurs much earlier. The urinary bladder usually holds in men 400-600 ml, in women 300-500 ml, but these values ​​vary widely.

    Through dilating sensors in the bladder wall, the filling state of the bladder is transmited to the central nervous system. The first switch point is located in the spinal cord (parasympathetic). he so-called voiding reflex is also triggered here, which induces the simultaneous contraction of the bladder muscle and relaxation of the internal sphincter muscle. From the brain the external sphincter muscle is controlled consciously. Only when this also relaxes, the urination begins.

    Gray-Blase-Frau
    Anatomy of female bladder;
     mod. nach H. Gray:  Anatomy of the Human Body
    Gray-Blase-Mann
    Anatomy of male bladder;
    mod. nach H. Gray:  Anatomy of the Human Body
  • Diagnostic
  • Benign diseases
  • Malignant diseases
  • Treatments
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