tentacular lumen

例句：

1. 1.The tentacles of the octopus are used to capture prey.
   章鱼的触手用于捕捉猎物。
2. 2. The tentacle lumen is a small opening in the tentacle that allows it to move and sense its environment.
   触手腔室是章鱼触手中的一个小开口，它允许触手移动并感知其环境。
3. 3. In some species of sea anemone, the tentacles have a lumen that can befilled with fluid to help them move through the water.
   在一些海葵种类中，触手腔室可以充满液体，帮助它们在水中移动。