medusome

例句：

1. 1. The medusomes are the basic units of an animal's body plan.
   纤毛虫是动物身体计划的基本单位。
2. 2. The hydra is a fascinating creature that can grow to enormous sizes.
   水螅是一种令人着迷的生物，可以长到非常大的尺寸。
3. 3.Polyps are small, soft-bodied creatures found in marine environments.
   海葵是海洋环境中发现的小型、柔软的生物。