The Muscular System
The Muscular System
- The Striated Muscle (those responsible for voluntary movements)
- Anatomy - Two types of fibers
- Extrafusal Fiber: these fibers do the work of the muscle.
- Intrafusal Fiber or Muscle Spindle: controls muscle tone and provides important sensory information.
- Contraction
- Controlled by the nervous system
- Muscles only shorten (i.e., only go one direction)
- Organized in opposition pairs.