The nervous system (speaker notes)
The NS is a network of neurons (specialized cells) that links different body parts to coordinate their activity. The system is divided into the Central nervous system (CNS) and the peripheral nervous system (PNS) which consist of the sensory and somatic nerves. The NS transmits messages between the body parts by electrical and chemical (neurotransmitters) signals. Generally sensory nerves transmit signals from sensory organs to the brain while motor nerves transmit signals from the brain to the muscles and the glands (effectors) (Guytona & Hall, 2006).
The CNS consists of the brain and the spinal cord. While the brain receives signals ...
