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:
Pectorals Trapezius Deltiods Triceps Biceps Rectus abdominus External Obliques Quadriceps Brachioradialis Gastrocnemius
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