There are two Main Parts of the Nervous System with differences. Already I have Describe the Structure of a Neuron A nervous system.
1 The Peripheral Nervous System
2 The Central Nervous System
The Peripheral Nervous System(PNS)
• The part of the nervous system that includes all parts of the nervous system except the brain and he spinal cord Division / Somatic Nervous System/ SNS Autonomic division / Autonomic Nervous System/ ANS Somatic Division: controls the voluntary movements of the skeletal muscles. Autonomic division: controls the involuntary movements all over the body; movements of the heart, lungs, stomach, glands and other organs.
Central Nervous System (CNS)
• Brain receives the information from all over the body (primarily in terms of stimulation via sensation), interprets it, and decides how to respond.
• The brain’s function is similar to that of a computer; there is a central processing unit (CPU), the output comes in, and the CPU analyses it and responds to it.
• The center of the nervous system.
• The vital organ that is responsible for the functions of seeing, hearing, smelling, tasting, thinking, feeling, remembering, speaking, dreaming, information processing, and a lot more.
• The regulator of basic survival functions such as breathing, resting and feeding.
• It is responsible for abstract level functions such as decision making, foresight, and problem solving.
• The spinal cord is an information highway connecting the PNS to the brain.
• Information travels to and from the brain by way of spinal cord.
Functions of the Various Structures of the Brain
• Regulation of the internal systems
• Adaptation to the varying environmental demands
Structure of Brain
• The deeply grooved structure lies safely and securely in our skull.
• The average adult human brain weighs 1.3 to 1.4 kg (approx. 3 pounds).
• If you look at it from the outside the brain is pinkish gray in color; soft, spongy, and mottled.
• The brain contains billions of nerve cells (neurons) and trillions of “support cells”.