Its location _ just below the normal one-way flow of food and germs in the large intestine in a sort of gut cul-de-sac -- helps support the theory, he said.

• 阑尾位于肠子中食物和细菌出口的下方，它让肠子成为一个封闭的通道。这一点上，支持了阑尾是细菌避难所的说法。