Answer
C.) The brain and spinal cord.
Explanation
The nervous system is a complex network of specialized cells and tissues that regulate and coordinate various functions of the body. It is divided into two main parts: the central nervous system (CNS) and the peripheral nervous system (PNS).
The CNS consists of the brain and spinal cord, which are responsible for processing and interpreting sensory information received from the body's organs and controlling body functions. The brain is the center of conscious thought and is responsible for higher cognitive functions such as memory, emotion, and reasoning. The spinal cord is a long, thin bundle of nerve fibers that carries information between the brain and the rest of the body.
On the other hand, the PNS connects the CNS to the body's limbs and organs, allowing them to communicate and interact with each other. It is comprised of all the nerves that lie outside the CNS, including sensory nerves, motor nerves, and autonomic nerves. Sensory nerves carry information from the body's senses, such as touch, taste, and smell, to the CNS. Motor nerves transmit signals from the CNS to the body's muscles and glands, enabling movement and secretion. Autonomic nerves control involuntary functions, such as heart rate and digestion.
Overall, the CNS and PNS work together to regulate and coordinate various functions of the body, from simple reflexes to complex thoughts and emotions. Understanding the structure and function of the nervous system is crucial in diagnosing and treating neurological disorders and maintaining overall health and well-being.
