Final answer:
The autonomic nervous system, comprised of the sympathetic and parasympathetic divisions, maintains the body's balance under normal conditions.
Explanation:
The system that operates to keep the body in balance under normal conditions is the autonomic nervous system. This system is further divided into the sympathetic and parasympathetic nervous systems, which work together to maintain homeostasis, controlling various internal functions like heart rate, digestion, and respiratory rate.
Learn more about homeostasis and nervous system divisions here:
https://brainly.com/question/44995922
