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The Nervous System
By: Marlayna
Botello, Taylor
Gersbach, John
Salvesen, Ryan
Estrada
The Nervous System
► The
Nervous
system an organ
system containing
a network of
neurons that send
emotion reactions
and functions from
the body to the
brain.
Major facts about the Nervous
System
► Senses
from inside the
body to the brain and
back again.
► Electric signals through
the spinal cord.
► Sends messages from
senses (nerves) to
brain to process
through neurons.
Major parts of the Nervous system
The Brain:
process signals /
feelings outside
and inside the
body , and sends
out signals for
reactions/
movement.
Neurons
send signals
from touch
to react.
Nerves is like a highway along the
spinal cord.
Spinal Cords: are like a signal
highway
Nerve impulse
From the sight of the stimuli, the nerve travels
trough the body and up the spinal cord
towards the brain, which then transmits and
processes information.
How the body system works
► Nervous
system is the
function of
everything.
► It sends signals
notify the brain to
react to the situation.
► Reflexes, movement,
muscles, everything!
4 Facts about the Nervous system
►
The average adult
human brain weighs 1.3
to 1.4 kg
(Approximately 3 Lbs)!!!
►A
stegosaurus dinosaur
weighed approximately
1600kg but bad a brain
that only weighed 70g
(.07 kg)
More Facts
► The
fastest brain
reaction recorded
was 100 m/s.
►A
child in the
womb develops
neurons at a rate
of 250,000
neurons per
minute.
Synapses
►
►
►
►
►
►
►
Electrical Synapses
Direct electrical
connections
Faster than chemical
reactions.
Happens between
neurons
Chemical synapses
Common and have a
circuit
Happens between neuron
cells and other cells
throughout the body.