muscular system

• smooth muscle

  narrow, tapered, rod shaped cells, non striated, uninucleated
• where does smooth muscle occur

  walls of internal organs and blood vessels
• cardiac muscle

  striated, tubular, branched, uninucleated fibres
• where does cardiac muscle occur

  wall of heart
• thin filaments

  actin
• thick filaments

  myosin
• elastic filaments

  titin
• myofibril

  rod like unit of muscle cell
• endomysium surrounds muscle fibres
• perimysium surrounds fascicles
• fascicle arrangements

  circular, parallel, fan shaped, fusiform, pennate
• what does fascicle arrangement determine

  ROM and power
• tendon

  DRCT, muscles to bones
• proximal

  origin and more fixed
• distal

  moveable and insertion
• motor neuron cell bodies are in the CNS
• motor neuron axons are in the spinal and cranial nerves and synapse on skeletal muscle cells at neuromuscular junctions