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Nervous system Facts

Network of neurons that coordinate the actions of a human or an animal and transmits signals between different parts of its body

  • The basic function of the nervous system is to send signals from one cells to other, or from one part of the body to others
  • Nervous system contains two parts – central and peripheral in most animals
  • Central nervous system in vertebrates contains brain, spinal cord and retina
  • Peripheral nervous system consists of sensory neurons, ganglia and nerves connecting to each other and the central nervous system
  • Neurons send signals to other cells as electrochemical waves
  • Sponges have no nervous system
  • Nervous system is made up of neurons and glial cells
  • Neurons communicate with other cells via synapses
  • Earthworms have dual nerve cords running along the length of the body and merging at the tail and the mouth
  • There are millions of nerve cells in human body
  • The neurons in the human brain are more than 100 billion in count.
  • The right side of the brain controls the left side of the body and the left side of the brain controls the right side of body.
  • The diameter of a neuro ranges between 4 to 100 microns.
  • Neurons grow at the rate of 250,000 per minute in a child developing inside the womb
  • The human spinal chord contains 13,500,00 neuros and the cluster of nerves located at the base of spine are most sensitive.
  • At any given point of time, the brain has only four percent of its cells active, while the rest are being kept in reserve.
  • Nervous system can transmit signals at 100 meters per second
  • Sodium ions, potassium and Vitamin B ensure the proper functioning of the nervous system
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