A possible explanation is that dendritic cells from iliac arteries are better able to sense flagellae because of the abundant bacterial flora that inhabits the gut, Weyand says.

• 例如，位于消化道的附近来源于髂动脉的细胞，对鞭毛的反应较为敏感，但向上肢供血的锁骨下动脉的细胞则不敏感。