The Muscular System

1. smooth muscle tissue

1.1. lack striations

1.2. lines walls of internal organs and blood vessels

1.3. involuntary control

1.4. contractions are slow and sustained

2. Muscle Functions

2.1. movement

2.1.1. locomotion

2.1.2. blood pumping

2.1.3. food digestion

2.1.4. urinating

2.2. posture maintenance

2.3. joint stability

2.4. heat generation (skeletal)

3. skeletal muscle tissue

3.1. long, thin, multi-nucleated fibers

3.2. striated

3.3. voluntary

3.4. contract rapidly

3.5. tire easily

3.6. arranged into packages called muscles

4. cardiac muscle tissue

4.1. network of fibers connected by gap junctions (intercalated discs)

4.2. only found in heart

4.3. striated

4.4. involuntary

4.5. rhythmic contraction set by "pacemaker"