Smooth Muscle

SMOOTH MUSCLE

  • Smooth muscle is present in the greatest quantity in the walls of arteries, lymph vessels and in gastrointestinal and reproductive tracts.
  • It is involuntary in nature.
  • Smooth muscle fibres are long, unevenly thickened in the centre and tapering on both the sides.
  • The myofibrils are homogenous and do not show alternating dark and light bands like those of skeletal muscle.
  • There are no Z or M-lines.
  • The SR is also not much developed. Smooth muscle is poorly supplied with blood.
Last modified: Monday, 6 September 2010, 8:36 AM