It is most complex system in the human body formed by a network of more than 100 million nerve cells or neurons assisted by many more glial cells.
Neuron is a functional unit of structure of nervous tissue. While neuroglial cells support and protecting the neurons.
Nervous system controls complicated processes like movement, thought and memory. It also plays an essential role in the things your body does without thinking, such as breathing, blushing and blinking.
General Functions of the Nervous System
•Sensory: gathers info about changes occurring within and around the body; sensoryreceptors, at ends of peripheral nerves, send signals to CNS examples–light, oxygen levels, body temperature
•Integrative: information is “brought together,” interpreted, to create sensations, create thoughts, add to memory, make decisions, etc.
•Motor: sending of signals to muscles and/or glands to elicit a response
Main division of nervous system:
-Central Nervous System (CNS) interpret incoming sensory information and issue instructions based on past e4perience and current conditions.
-Peripheral Nervous System link all parts of the body by carrying impulses from the sensory receptors to the CNS and from the CNS to the appropriate glands or muscles.
Nervous system
