The neurological system primarily consists of which structures?

The neurological system is primarily made up of the brain and spinal cord, which are central components of the central nervous system (CNS). The brain serves as the control center for the body, responsible for processing sensory information, coordinating movement, and regulating various bodily functions. The spinal cord acts as a vital communication pathway, connecting the brain to the rest of the body and facilitating the immediate responses to stimuli through reflex arcs.

In contrast, the other options involve structures that belong to different systems. Muscles and tendons are part of the muscular system and are primarily responsible for movement. Joints and ligaments provide structural support and stability within the skeletal system but do not play a direct role in neurological functions. Cartilage and bursae are also associated with the musculoskeletal system, helping to reduce friction between bones at joints but not directly involved in the neurological processes. Thus, the brain and spinal cord uniquely define the neurological system's roles and functions.