Cardiac Muscle Tissue

Key:

  1. Intercalated discs
  2. Nucleus (one per cell)
  3. Striations (faint)
  4. Another Intercalated disc

Description:

  • These cells are also striated and again, it is due to the arrangement of the myofilaments in the cells.
  • The cells branch
  • The cells generally have one nucleus
  • The cells join at specialized junctions called Intercalated Discs
  • These Intercalated Discs make it easy to distinguish cardiac muscle from skeletal muscle because skeletal muscle does not have Intercalated Discs.
  • This tissue is involuntarily controlled, meaning we do not have conscious control over this tissue.

Function:

  • Contracts to pump and propel blood into and through the circulatory system.

Location:

  • Walls of the heart