messageds = new Array()
messageds[0] = null;
messageds[1] = "Brain:
the body's control centre "
messageds[2] = "Coastal nerves:
go to the ribs and chest
muscles."
messageds[3] = "Spinal cord:
has many millions of nerve
cells inside it."
messageds[4] = "Lumbar nerves:
branch from the spine
between the lumbar vertebrae
(lower backbones)."
messageds[5] = "Plantar nerves:
carry signals from the skin
of the sole that give
information about the contact
between the foot and the
ground."
messageds[6] = "Peroneal and tibial nerves:
run alongside the tibia
(shin-bone)."
messageds[7] = "Sciatic nerve:
the body's thickest single
nerve, as thick as your
middle finger."
messageds[8] = "Median, radial, and ulnar
nerves:
carry messages from the
sensitive skin of the fingertips
and to the hand and finger
muscles. "
messageds[9] = "Facial nerves:
control facial movements and
carry messages from the skin
of the face."
messageds[24] = "The Nervous System
Like the circulatory system,
the nervous system has
branches all over the body. Its
nerves divide many times. The
thickest nerves look like
pieces of cream-coloured
rope, and the thinnest are
narrower than a hair. Nerves
are made of bundles of nerve
cells (opposite). These cells/
specially designed to carry tiny
electrical messages. Some
nerve cells are called sensory
cells. They carry signals from
the sense organs, such as
the eyes and ears, to the
brain, where they are
analysed. Other nerve cells
are called motor cells. They
carry nerve signals from the
brain and spinal cord to the
muscles, telling them when to
contract and when to relax
Many nerves contain both
sensory and motor nerve
cells."