Terms
Sphincter(noun) – a ring of muscle surrounding and serving to guard or close an opening or tube, such as the anus or the openings of the stomach.
Squeezes(verb) – To firmly press (something soft or yielding), typically with one’s fingers.
Urine(noun) – a watery, typically yellowish fluid stored in the bladder and discharged through the urethra. It is one of the body’s chief means of eliminating excess water and salt, and also contains nitrogen compounds such as urea and other waste substances removed from the blood by the kidneys.