Which of the following is included in the nervous/behavioral system?

The inclusion of the brain, nerves, and mind in the nervous/behavioral system is essential as these components work together to govern the body's response to internal and external stimuli. The brain is the central organ of the nervous system, processing information and coordinating responses, while nerves function as the communication pathways, transmitting signals between different parts of the body and the brain. Additionally, the mind relates to mental processes, consciousness, and behavior, highlighting the interplay between the brain's physical structure and its functional role in behavior and cognition.

In contrast, the heart and blood vessels are part of the cardiovascular system, which is responsible for circulating blood throughout the body but does not directly relate to nervous or behavioral functions. The pancreas and thyroid glands are components of the endocrine system, responsible for hormone regulation and metabolic processes, which also do not fit within the nervous/behavioral system. Finally, skin and hair are part of the integumentary system and mainly serve protective and sensory functions, and while they can be influenced by the nervous system, they are not components of it themselves.