<P> The cremaster develops to its full extent only in males; in females it is represented by only a few muscle loops . </P> <P> In female humans, the cremaster muscle is smaller and is found on the round ligament . </P> <P> In rats, it has been shown that cremaster muscles developed from the gubernacular bulb . </P> <P> The cremaster muscle's function is to raise and lower the testes in order to regulate scrotal temperature for optimal spermatogenesis and survival of the resultant spermatozoa . It does this by increasing or decreasing the exposed surface area of the surrounding tissue, allowing faster or slower dissipation of body heat . </P>

What is the function of the cremaster muscle