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16 Cards in this Set
- Front
- Back
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Urinary bladder
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a hollow distensible muscular organ situated in the pelvic cavity post. to the pubic symphysis.
receives urine via two ureters and stores urine until it is excreted throught the urethra. |
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rectum
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Urinary bladder is located anterior to _______ in male.
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vagina
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Urinary bladder is located anterior to _______ in female.
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Urinary bladder
(shape) |
depend on how much urine it contains
if empty, it collapses when slight distended it becomes spherical when volume increases, it becomes pear-shaped |
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Trigone
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the floor of the urinary bladder is a small triangular area
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urethra
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The _______ is in the anterior corner of trigone.
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ureteral openings
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two post. corners contain the two _____ _____ of the trigone.
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Bladder wall histology
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Mucosa (mucous membrane plus transitional epithelium)
Rugae present Submucosa (dense irr. conn. tissue) Muscular coat (detrusor muscle) 3 layers of smooth muscle Int. urethral sphincter Ext. urethral sphincter Serous coat |
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Muscular coat (detrusor muscle) 3 layers of smooth muscle
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Inner longitudinal
Middle circular Outer longitudinal |
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Serous coat
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from peritenium
covers superior surface of bladder only |
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Int. urethral sphincter
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what sphincter is involuntary?
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Ext. urethral sphincter
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what sphincter is voluntary?
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Urinary bladder
(FUNCTION) |
Urine storage
Micturition |
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Micturition
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The act of expelling urine from the urinary bladder.
Aka - urination or voiding |
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"micturition reflex"
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stretch receptors initiate ________ ______ when urine volume exceeds 200-400 ml.
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P.N.S
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____ causes contraction of bladder and relaxation of int. sphincter
ext. sphincter is under voluntary control. |
