anal pit

肛窝

1. 肛道：anal papilla 肛乳头 | anal pit 肛道 | anal region 肛门区

2. 肛窝：anal pedicel || 肛柄 | anal pit || 肛窝 | anal proleg || 尾足

3. 肛凹：肝下位盲肠subhepatic caecum | 肛凹anal pit | 肛膜anal membrane

4. 肛道,原肛：anal pecten ==> 肛梳 | anal pit ==> 肛道,原肛 | anal plate ==> 肛板,肛膜