Characteristics
More than 600 ___ make up the muscular system
Muscles
Adduction
Moving a body part toward the midline
Abduction
Moving a body part away from the midline
Is the visceral muscle voluntary or involuntary?
Involuntary
Muscle fibers that are stimulated by nerves contract or become short and thick, which causes movement.
Contractibility
Pronation
Turning a body part downward
Extension
Increasing the angle between two bones, or straightening a body part
Ligaments connect what?
Bones to bones
The ability to be stretched
Extensibility
Rotation
Turning a body part around its own axis; for example, turning the head from side to side
Supination
Turning a body part upward
When a muscle attaches to a bone, the end that does not move is called what?
Origin
Allows the muscle to return to its original shape after it has contracted or stretched
Elasticity
Flexion
Decreasing the angle between two bones, or bending a body part
Plantar Flexion
bending forward or bending the foot away from the knee
Which muscle helps maintain posture by holding the body erect?
Skeletal Muscle
Irritability, the ability to respond to a stimulus such as a nerve impulse
Excitibilty
Bending backward or bending the foot toward the knee
Dorsiflexion
moving in a circle at a joint, or moving one end of a body part in a circle while the other end remains stationary
Circumduction
What is the largest muscle in the body?
Gluteus maximus