Minggu, 16 Desember 2012

Located behind the os pubis

Bladder (vesika urinaria)

    
Located behind the os pubis.
    
VU empty having pyramid-shaped peak (apex), dorsal surface (as a base), the superior wall and two walls lateroinferior.
    
If VU is fully charged, the upper surface will protrude into the abdominal cavity, and ovoid-shaped (like eggs), mucous membranes no longer shaped folds.
    
In the corner there is a superior ureter, the inferior angle there orificium Internum urethra.

PROCESS urination




    
A reflex process governed by reflex centers in the brain.
    
Stimulation (impulses) resulting from VU wall teregangnya delivered by the sensory neurons of visceral afferents through n. splanchnicus entering the sacral spinal cord segments 2,3, and 4.
    
Nerve stimulation causes smooth muscles to contract VU, m. vesicae sphincter relaxes. Efferent neurons of the sympathetic took a stroll through the urethra sphincter pudendus heading.
    
Control of micturition children from age 3-4 years.

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