Muscles

1. Types

1.1. Cardiac

1.1.1. Involuntary move

1.1.2. Has stripes

1.1.3. One nucleus

1.2. Smooth

1.2.1. Involuntary move

1.2.2. Doesn't have stripes

1.2.3. One nucleus

1.3. Skeletal

1.3.1. Voluntary move

1.3.2. Has stripes

1.3.3. Lots of nucleus

2. Muscle anatomy

2.1. Fibers (Muscle cells)

2.2. Myofibrils

2.2.1. Sarcomeres

2.2.1.1. Allow the muscles to

2.2.1.1.1. Contract

2.2.1.1.2. Relax

2.2.1.2. Myofilaments

2.2.1.2.1. Protein