medullary stele

例句：

1. 1. The medullary stele of the bone is responsible for the transport of nutrients to the surrounding tissue.
   骨骼的髓质管负责将营养物质输送到周围组织。
2. 2. The medullary stele of the heart is crucial for maintaining blood pressure and oxygen delivery.
   心脏的髓质管对于维持血压和氧气输送至关重要。
3. 3. The medullary stele of the liver plays a vital role in detoxification and waste removal.
   肝脏的髓质管在解毒和废物清除方面起着重要作用。