The Nervous System is the system of cells, tissues, and organs that regulates the body's responses to internal and external stimuli. In vertebrates it consists of the brain, spinal cord, nerves, ganglia, and parts of the receptor and effector organs. Your nervous system is composed of the central nervous system, the cranial nerves, and the peripheral nerves. The brain and spinal cord together form the central nervous system. The cranial nerves connect the brain to …showed first 75 words of 692 total…

…showed last 75 words of 692 total…pia mater is the innermost layer of the meninges. Unlike the other layers, this tissue is close to the brain. The spinal cord carries out two main functions: It connects a large part of the peripheral nervous system to the brain. Information reaching the spinal cord through sensory neurons is transmitted up into the brain. Signals arising in the motor areas of the brain travel back down the cord and leave in the motor neurons.