Muscle

1. Types of muscles

1.1. Skeletal

1.1.1. Voluntary

1.1.1.1. most prevalent muscle

1.1.1.1.1. striated

1.2. Cardiac

1.2.1. Involuntary

1.2.1.1. innervated by ANS

1.2.1.1.1. striated muscle; specific feature is intercalated disc

1.3. Smooth

1.3.1. Involuntary; starts with nerve impulse

1.3.1.1. innervated by ANS

1.3.1.1.1. Very few filaments of actin and myosin

2. Formed by:

2.1. muscle cell or fibers

2.1.1. CT binds to muscle fibers and makes bundles of fibers

2.2. Tendons

2.2.1. Helps with movement; connects muscle to bone by attachment

3. muscle action

3.1. isometric; equal resistance

3.1.1. concentric; muscle shortens

3.1.1.1. eccentric; muscle lengthens