许多植物和动物都被认为是“灵巧结构”，它们能对周围环境感知并作出反应，对动物而言，神经末梢用来对环境中的光、热和压力的感知。这些信号被传递到大脑，在那里信号被处理并决定对此如何作出反应。如果有必要作出反应，一个信号将通过另一根神经传递出去，于是该动物就对 Many plants and animals are considered “dexterous structures” that sense and react to the environment in which they are used to sense light, heat and stress in the environment. These signals are passed to the brain, where the signals are processed and decide how to react. If it is necessary to react, a signal will be transmitted through another nerve, so the animal is right