vascellum

例句：

1. 1. The doctor examined the patient's vascellum and found no signs of infection.
   医生检查了患者的小血管，没有发现感染的迹象。
2. 2.The scientist discovered a new species of fish in the vascellum of the ocean.
   科学家在海洋的小血管中发现了一种新的鱼类。
3. 3. The vascellum is responsible for carrying blood from the heart to the rest of the body.
   小血管负责将血液从心脏输送到身体其他部位。