3450
Table of Contents > Health Dictionary > Internal urethral sphincter

Internal urethral sphincter

The complete collar of smooth muscle cells of the neck of the urinary bladder that extends distally to surround the preprostatic portion of the male urethra. There is no comparable structure in the neck of the female bladder; the internal urethral sphincter may exist to prevent reflux of semen into the bladder.
    Delicious Living
    Top Health
    Conditions
    To learn more, select a condition from the following menu.

    Healthy Living Marketplace
    UAS Labs DDS Probiotics
    Solgar
    Now Food
    Nutribiotic
    Now Food
    North American Herb & Spice