There’s a muscle, called the puborectalis muscle, that loops around your digestive tract between those two sections, and it helps keep poop inside you when you aren’t trying to eliminate it.

有一种肌肉， 称为耻骨直肠肌，在这两个部分之间环绕着您的消化道， 当您不试图消除它时， 它有助于将便便留在您体内。