The excretory opening of the digestive tract in animals such as birds, reptiles, amphibians, and fish.
The excretory opening of the digestive tract in animals such as birds, reptiles, amphibians, and fish.
肛门鸟、爬行动物、两栖动物以及鱼等动物的消化道的排泄口
The excretory opening of the digestive tract in animals such as birds, reptiles, amphibians, and fish.
肛门鸟、爬行动物、两栖动物以及鱼等动物的消化道的排泄口