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A LITTLE DEFINITION OF MUSCLE

Muscle make up about 45 percent of man's body weight,
Be comparison, bones account for just 12 percent. They're about
80 percent water. Most of the rest of muscle tissue is protein,
although there's also carbohydrate,fat,and salt. Your body has
three different types of muscle tissue.
1: SKELETAL Muscles are the ones you check out the mirror.
These are also called voluntary muscles since you can move them at will.
Conveniently,they're able to work without your thinking about them.
they maintain a state of slight readiness-called muscle tone-whether you
consciously tighten them or not.
if they didn't,you'd collapse in gelatinous heap.
the only time they lose this tone entirely (in the absence of muscular disease)
is when your body is completely unconscious because of either trauma or medication.
2: SMOOTH muscles surround your blood vessels and internal organs in thin layers.
whereas skeletal muscles can resemble steel cable (we like to think do, anyway),
smooth muscles look like interesting bedsheets.
3: CARDIAC muscle has fibers that look like those of skeletal muscle.
the crucial difference is that skeletal muscle is made up individual fiber that,
like the wires of cable, work closely together, side by side, but aren't attached to
each other. cardiac muscle fibers are attached to each other, which allows them
to send information from cell to cell in the form of electrical signals. imagine
walking that's the short and great definition of muscle...