<P> A sphincter is a circular muscle that normally maintains constriction of a natural body passage or orifice and which relaxes as required by normal physiological functioning . Sphincters are found in many animals . There are over 60 types in the human body , some microscopically small , in particular the millions of precapillary sphincters . Sphincters relax at death , often releasing fluids . </P>
<P> A sphincter is a circular muscle that normally maintains constriction of a natural body passage or orifice and which relaxes as required by normal physiological functioning . Sphincters are found in many animals . There are over 60 types in the human body , some microscopically small , in particular the millions of precapillary sphincters . Sphincters relax at death , often releasing fluids . </P>
how many sphincter muscles are in the body
how many sphincter muscles are in the body
60 types in the human body
60 types in the human body