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455

Centuries: 4th century - 5th century - 6th century

Decades: 400s 410s 420s 430s 440s - 450s - 460s 470s 480s 490s 500s

Years: 450 451 452 453 454 - 455 - 456 457 458 459 460


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Urethra

... The external urethral sphincter is the skeletal muscle that allows voluntary control over urination. In the human female, the urethra is about 1-1.5 inches (25-38 mm) ...

 
 
 
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