Human Body System

Nervous System    
By: Zamaria Lewis

The nervous system is a complex structure of nerves of neurons that transmit signals around the the body to coordinate actions. It is in effect our body's electrical wiring.  Main Parts is the central nervous system (CNS) and the peripheral nervous system (PNS). The nervous system of vertebrates (which includes humans and animals that have backbones and spinal columns) has two parts, the central nervous system (CNS) and the peripheral nervous system (PNS). The PNS includes all other nervous system structures that sit outside the CNS but that help connect the CNS to areas of the body.

                                                            Diseases and Disorders

Brain and nervous system problems are common. These neurological disorders include multiple sclerosis, Alzheimer's disease, Parkinson's disease, epilepsy, and stroke, and can affect memory and ability to perform daily activities.

                                     5+ Facts About The Body System and Its Parts

  • Sensory neurons change light, touch and sound into neural signals which are sent back to our CNS to help our body understand and react to its surroundings.
  • Motor neurons transmit neural signals to activate muscles or glands.
  • There are approximately 100 billion neurons in the human brain and 13.5 million neurons in the human spinal chord.
  • The nervous system can transmit signals at speeds of 100 meters (328 feet) per second.
  • The field of science that focuses on the study of the nervous system is called neuroscience. Neurology is the medical branch of study and treatment, while doctors and surgeons in this field are called neurologists and neurosurgeons.
  • Nerves in our body can be vulnerable to both physical damage and damage through diseases. Damage to nerves can cause great pain, loss of feeling, or loss of muscle control.
  • Physiatrists help rehabilitate patients with nervous system damage.

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