Muscular System Muscular System

600 Muscles600 Muscles

3 types of muscles3 types of muscles

Smooth Muscles- Which include the Smooth Muscles- Which include the muscles of internal organs and blood muscles of internal organs and blood vessels. These muscles move vessels. These muscles move involuntary. involuntary.

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

Skeletal Muscles- Are voluntary and Skeletal Muscles- Are voluntary and help you move. help you move.

Muscle MovementMuscle Movement

Involuntary- Automatically move Involuntary- Automatically move without you knowing.without you knowing.

Voluntary- Brain sends message to Voluntary- Brain sends message to muscle. You control the movements. muscle. You control the movements.

Occuli

Sternomastoid

Pectoralis Major

Bicep Brachii

External Oblique

Sartorius

Extensor Digitorum

Tibialis Anterior

Quadriceps

Abdominals

Facial Buccinators

Types Of Muscles Types Of Muscles

Smooth Muscle- Digestive organs, Smooth Muscle- Digestive organs, Makes up 7-8% of your muscles. Makes up 7-8% of your muscles.

Involuntary Involuntary

Types of Muscles cont. Types of Muscles cont.

Cardiac Muscles- Only found in the Cardiac Muscles- Only found in the heart. heart.

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

times (assume resting heart beat). times (assume resting heart beat).

Types of Muscles cont. Types of Muscles cont.

Skeletal Muscles- Makes up 90% of Skeletal Muscles- Makes up 90% of your muscles.your muscles.

Voluntary- These are the muscles Voluntary- These are the muscles that you can move. that you can move.

Types of InjuriesTypes of Injuries

Strain- Muscle “pull” or “strain”Strain- Muscle “pull” or “strain” Tearing a muscle fiber(s), followed by Tearing a muscle fiber(s), followed by

bleeding or swelling of musclebleeding or swelling of muscle

Muscle Cramp- Muscle Cramp- Prolonged Prolonged contraction of muscle, ion contraction of muscle, ion imbalance imbalance

Muscle Terms

Flexion- Movement that reduces a joint angle

Extension- A movement that increases a joint angle

Body Movements

Flexing of the hamstring.

Body Movements cont.

Extension of the quadriceps.

Muscle Pairs

Your muscles work in teams to move your body. An example of this is your Bicep and Tricep.

Trapezius

Deltoid

Tricep

Latissimus Dorsi

Gluteus Maximus

Hamstring

Gastrocnemius