Muscles of the Body - gst boces

Muscles of the Body
Science 7

Voluntary Muscles
Muscles that we can control. These
muscles are the skeletal muscles that are
attached to our bones. Think of a few
skeletal muscles in your body.

Involuntary Muscles
Muscles that we can not control, such
as the heart and the digestive system.

Skeletal Muscles
• Muscles that are attached to the bone. These
muscles have stripes, called striations.
Are these muscles voluntary or involuntary??

Smooth Muscle
Involuntary muscles that we can not
control. Think of some smooth muscle in
our body??? These muscles lack
striations.

Cardiac Muscles
Muscles of the heart; these muscles
have striations.
Are these muscles voluntary or involuntary?

Striations
Striping found in cardiac and skeletal
muscles.

Tendon
• Connective tissue that holds muscle to
muscle and muscle to bone.

Muscle Action
The contraction (shortening and thickening)
of a muscle when it works. Do you think
muscles work alone or in pairs???

Muscle Tone
The ability the muscle has to contract.

Muscle Relaxation
When a muscle rests it relaxes; the
muscle OH0Q3JW9KH0Q3V8 and becomes thinner.

Muscle Contraction
When a muscle works it pulls and becomes
short and bulged, this action is called a
muscle contraction.

Fatigue
The build-up of wastes in a muscle from
over exercise/exhaustion. This leads to
muscle cramps.