1. Nervous

2. Characteristics 2 types of cells: neurons, neuroglia
Found in the brain, spinal cord, and peripheral nerves throughout the body.
Very little regeneration

3. Functions response, conducts impulses
sense stimuli in both the internal and external environment

6. Types: classified according to function
Sensory: conducts impulses from environment to the CNS (brain and spinal cord)
Associative (inter): connect between sensory and motor neurons
Motor: conducts impulses from CNS to the effector organs (muscles and glands)