Muscular System 600 Muscles

3 types of muscles Smooth Muscles:  Which include

the muscles of internal organs and blood vessels.  These muscles move involuntary. 

Cardiac Muscle:  Found only in the heart and also involuntary.  

Skeletal Muscles:  Are voluntary  and help you move.  

Muscle Movement Involuntary: Automatically move

without you knowing. Examples?

Voluntary: Brain sends message to muscle.  You control the movements.  Examples?

Types Of Muscles Smooth Muscle: Digestive organs,

Makes up 7-8% of your muscles.  Involuntary:

Trapezius

Rectus abdominus

Brachioradialis

Gastrocnemius

Pectorals

Deltiods

Triceps

Biceps

External Obliques

Quadriceps

Types of Muscles cont. Cardiac Muscles: Only found in the

heart.  Involuntary. Makes up 3% of your muscles. By age 70 heart contracts 2.5 billion

times (assume resting heart beat).

Types of Muscles cont. Skeletal Muscles- Makes up 90% of

your muscles. Voluntary- These are the muscles

that you can move.

Muscle Terms Flexion- Movement that reduces a

joint angle Name or show a joint that you can flex.

Extension- A movement that increases a joint angle Name or show a joint that you can

extend.

Body Movements Flexing of the hamstring.

Body Movements cont. Extension of the quadriceps.

MORE MUSCLES

Trapezius

Deltoid

Tricep

Latissimus Dorsi

Gluteus Maximus

Hamstring

Gastrocnemius