What does the central nervous system (CNS) coordinate?

The central nervous system (CNS) plays a vital role in coordinating both mechanical and chemical actions throughout the body. This includes processing sensory information, controlling motor functions, and regulating bodily processes via chemical signals, such as neurotransmitters. The CNS is involved in responses to stimuli that may require physical movement (mechanical actions) as well as the regulation and integration of physiological processes that involve chemical signaling, such as hormone release and metabolic functions. This dual capability allows the CNS to maintain homeostasis and ensure the body responds effectively to internal and external changes.

The other options do not encompass the full scope of the CNS's role. While the mechanical actions are significant, the exclusion of chemical actions does not represent the comprehensive function of the CNS. Likewise, focusing solely on chemical actions or digestive processes misconstrues the centrality of the CNS in a broader context where both mechanical and chemical interactions are critical for overall bodily function.