messageds = new Array()
messageds[0] = null;
messageds[1] = "Frontalis:
raises the eyebrows and
wrinkles the forehead."
messageds[2] = "Sternocleidomastoid:
nods the head and twists
the neck."
messageds[3] = "Biceps brachii:
bends the elbow by
pulling on the forearm."
messageds[4] = "Sartorius:
the body's longest muscle,
helping to bend the knee
and twist the leg."
messageds[5] = "Extensor diagram longus:
bends the toes upward."
messageds[6] = "Tibialis anterior:
bends the ankle to curl
the sole inward."
messageds[7] = "Quadriceps femoris:
a group of four muscles
that straighten the knee,
as when you kick"
messageds[8] = "Carpal ligaments:
fibrous tissue that holds
the tendons which pass
through the wrist."
messageds[9] = "External oblique:
twists the body and bends
it to one side."
messageds[10] = "Pectoralis major:
the main muscle on the
front of the chest,
stabilizing and moving the
shoulder."
messageds[11] = "Orbicularis oculi:
closes the eyelids"
messageds[12] = "Trapezius:
draws the shoulders back
and helps lift the arm."
messageds[13] = "Deltoid:
raises the arm away from
the body and swings the
arm during walking."
messageds[14] = "Extensor digitorum:
straightens the fingers."
messageds[15] = "Gluteus maximus:
the body's bulkiest muscle,
propelling the body
forward when you run."
messageds[16] = "Gastrocnemius:
pulls the heel up, as
when you stand on
tiptoe."
messageds[17] = "Achilles tendon:
the body's longest,
strongest tendon."
messageds[18] = "Biceps femoris:
one of the main muscles
that bend the knee."
messageds[19] = "Latissimus dorsi:
pulls the arm back, lifts
it for reaching, and moves
the shoulder."
messageds[20] = "Splenius capitis:
twists the neck and tips
the head back."
messageds[24] = "Muscles
About two-fifths of your body
weight is muscle. There are
basically two types of muscle:
skeletal and smooth. Skeletal
muscles are designed to
contract. By doing so, they pull
your bones to make you move.
They are also known as
voluntary muscles, since you
can control them at will, unlike
the involuntary (or smooth)
muscles in parts such as the
stomach and blood vessels.
Muscles are controlled by
electrical signals from the
brain. The more signals that
arrive, the more the muscle
contracts, until it reaches its
minimum length-about three-
fifths of its relaxed length."