With the introduction of such modern conveniences such as the automobile, remote
control, and even the electric toothbrush people are relying on technology to do
everything for them. With a generation growing up in todays society physical
tasks have almost become obsolete. Tasks such as even going shopping and going
out to visit a friend can be done from the comfort of your own computer. With
this sedentary lifestyle, muscular size will almost be unnecessary, except for
the athlete who wants to succeed in sports. To the non-athlete, there will be
no reason to leave the house because everything that you need will be at your
fingertips, you will not have to get up and do anything. Any type of exercise
is good for the body and muscles. Muscle growth is essential if you want to
look better, feel better, and perform everyday tasks such as walking to the car,
and getting out of bed easier. A person who is in shape will also sleep better
then an out of shape person, and feel more revitalized in the morning.
Muscles account for approximently 35% of the body weight in women, and about 45%
of the body weight in men. With over 600 muscles covering the human skeleton
muscles give the body bulk and form. Then human body contains millions of
muscle fibres whose coordinated contraction cause the whole muscle to contract.
Muscles are the foundation on which our bodies are built. Without muscles our
bodies could not perform the simplest tasks such as opening our eyes, talking,
breathing and even the pumping of our heart or the most difficult tasks, such as
running the hurdles in a track and field event.. Muscles are also important to
maintain balance and posture.
Description of Muscles
In the body there are several types of muscles that control different functions
in the body, one of these types being skeletal muscle. Skeletal muscle is the
most evident in the human body due to it having the most mass the other types of
muscles and that it lies directly under the skin attached to the skeleton by
tendons and ligaments.
Skeletal muscles are divided into three structural units, the entire muscle, the
muscle bundle, and the muscle fiber (cell). Each muscle fiber is divided into
two types of fiber structure, fusiform and pennate, with the pennate being
broken up into three basic structures. These structures being the unipennate,
bipennate, and multipennate.
Notice the longditudinal
grain of the
fusiform muscles (left)
pennate muscles. (below)
Striated muscle tissue (above) is associated with the muscles related to the
skeleton and movement. Striated muscle tissue is the muscle tissue located
directly under the skin and are the muscles that are the most visible.
There are two types muscles in skeletal muscles, these are fast twitch and slow
twitch muscles. Fast twitch muscles...