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. 

Types Of Muscles Smooth Muscle: Digestive organs, Makes up 7-8% of your muscles.  Involuntary:

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.

Pectorals Trapezius Deltiods Triceps Biceps Abdominals Obliques Quadriceps Brachioradialis Gastrocnemius / Calf

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