vascular ray initial cell

例句：

1. 1. The vascular system is responsiblefor delivering oxygen and nutrients to the body's cells.
   血管系统负责将氧气和营养物质输送到身体细胞。
2. 2. The studyof vascular biology has led to newtreatments for diseases like cancer.
   血管生物学的研究已经导致了新的癌症治疗方法的出现。
3. 3. Thevascular system plays a crucial role in maintaininghomeostasis in the body.
   血管系统在维护身体稳态中起着至关重要的作用。