而肥螈的皮肤较光滑，颗粒腺聚集形成背嵴和耳后腺，尾部颗粒腺非常丰富，具有重要的防御天敌功能，也是可持续利用的药用资源。
The granular glands assembled in the back and tail have important antipredator function and are the officinal continuous resources .
耳后腺