NERVOUS ANATOMY
AND PHYSIOLOGY
Sydney and Hannah
Primary Functions
• The nervous system is a complex collection of nerves
and specialized cells known as neurons that transmit
signals between different parts of the body. It is
essentially the body’s electrical wiring .
Major parts
• Structurally, the nervous system
has two components: the central
nervous system and the
peripheral nervous system. The
central nervous system is made
up of the brain, spinal cord and
nerves. The peripheral nervous
system consists of sensory
neurons, ganglia (clusters of
neurons) and nerves that
connect to one another and to
the central nervous system.
Terminology
• Meninges- protective membranous
coverings for the central nervous
system
• Cerebrum- main part of the brain
consisting of two cerebral
hemispheres; largest part of the
brain in mammals
• Cranial nerve- nerve that arises
from the brain
• Nerve impulse- action potential
traveling along a neuron
• Spinal nerve- nerve that arises from
the spinal cord
Facts
• There are more nerve cells in the human brain than there are stars
in the Milky Way.
• The left side of human brain controls the right side of the body and
the right side of the brain controls the left side of the body.
• Neurons send signals to other cells as electrochemical waves
• The neurons in the human brain are more than 100 billion in count.
• 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
Work Cited
• http://www.livescience.com/22665-nervous-system.html
• http://www.22facts.com/nervous-system/
• http://allaboutthenervoussystem.weebly.com/fun-facts.html
• https://quizlet.com/5746789/nervous-system-terminology-flashcards/