Which system is in charge of transmitting signals to the body and operates basic functions like breathing and digestion?

The neurologic system is responsible for transmitting signals throughout the body, coordinating various functions essential for survival, including basic autonomic functions such as breathing and digestion. It consists of the brain, spinal cord, and a network of nerves that relay information between different parts of the body and the central nervous system. This system controls not only voluntary movements but also involuntary processes like the heartbeat and the reflexive actions associated with digestion.

The other systems mentioned play important roles, but they do not primarily handle the transmission of signals. For example, the circulatory system is responsible for transporting blood, nutrients, and oxygen to tissues, while the endocrine system regulates processes through hormones, having more of an indirect influence on bodily functions. The musculoskeletal system provides structure and facilitates movement but does not transmit signals or autonomously regulate functions. Understanding the specific roles of these systems clarifies why the neurologic system is the correct choice for this question.