| The human body
contains more than 650 individual
muscles which are attached to the
skeleton, which provides the
pulling power for us to move
around. The main job of the
muscular system is to provide
movement for the body. The
muscular system consist of three
different types of muscle tissues
: skeletal, cardiac, smooth. Each
of these different tissues has
the ability to contract, which
then allows body movements and
functions. There are two types of
muscles in the system and they
are the involuntary muscles, and
the voluntary muscles. The muscle
in which we are allow to control
by ourselves are called the
voluntary muscles and the ones we
can? control are the involuntary
muscles. The heart, or the
cardiac muscle, is an example of
involuntary muscle. CARDIAC
MUSCLE:
The cardiac muscles is the
muscle of the brain itself. The
cardiac muscle is the tissue that
makes up the wall of the heart
called the mydocardium. Also like
the skeletal muscles, the cardiac
muscle is striated and contracts
through the sliding filament
method. However it is different
from other types of muscles
because it forms branching
fibers. Unlike the skeletal
muscles, the cardiac muscle is
attached together instead of been
attach to a bone.
SKELETAL MUSCLE:
The skeletal muscle makes up
about 40 % of an adults body
weight. It has stripe-like
markings, or striations. The
skeletal muscles is composed of
long muscle fibers. Each of these
muscles fiber is a cell which
contains several nuclei. The
nervous system controls the
contraction of the muscle. Many
of the skeletal muscle
contractions are automatic.
However we still can control the
action of the skeletal muscle.
And it is because of this reason
that the skeletal muscle is also
called voluntary muscle.
SMOOTH MUSCLE:
Much of our internal organs is
made up of smooth muscles. They
are found in the urinary bladder,
gallbladder, arteries, and veins.
Also the digestive tract is made
up of smooth muscle as well. The
smooth muscles are controlled by
the nervous system and hormones.
We cannot consciously control the
smooth muscle that is why they
are often called involuntary
muscles.
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