Kinds of muscles: Cardiac- involuntary forms the wall of the heart Visceral or smooth- involuntary found in internal organs Skeletal- Voluntary attaches the bones

Functions of Muscles: Attach to bones to provide voluntary movement Produce heat and energy Help maintain posture Protect internal organs

Muscle Tone: Partiall contracted at all times Muscle tone allows for state of readiness Loss of muscle tone- Paralysis, contracture permanant shorting of flexer muscle

Diseases and Abnormal Conditions: Muscle spasms and cramps- Sudden painful involuntary Contractions of muscles Strain- Overstreching or injury to a muscle or tendons