Changes

}}</ref> In infancy, the dartos fascia operates as a one-way check valve at the tip of the foreskin, allowing [[urine ]] to pass out, but prohibiting the entry of foreign matter and pathogens.<ref>{{REFjournal

|quote=The sphincter action of the preputial orifice functions like a one way valve, blocking the entry of contaminants while allowing the passage of [[urine]].