Muscle

• Functions of Muscle Tissues

  • The main function of muscle tissue is to contract, or shorten, making movement possible.

  • Muscle contraction results from contractile proteins located within the muscle cells.

  • The muscle also stabilizes the body positions and move substances within the body

  • It generates heat (thermoregulation
• Characteristics of Muscle Tissues

  • Excitability, also termed responsiveness or irritability, is the ability to receive and respond to a stimulus, that is, any change in the environment either inside or outside the body.
• Characteristics of Muscle Tissues

  • Contractility is the ability to shorten forcibly when adequately stimulated.
• Characteristics of Muscle Tissues

  • Extensibility is the ability to be stretched or extended. Muscle cells shorten when contracting, but they can be stretched, even beyond their resting length, when relaxed.
• Characteristics of Muscle Tissues

  • Elasticity is the ability of a muscle cell to recoil and resume its resting length after being stretched
• smooth and cardiac are involuntary while skeletal is voluntary

  
• Skeletal Muscle

  • move joints, support the skeleton, and assist in breathing. They are connected to the skeleton via tendons, and they are all under voluntary control.

  • It has striated, tubular and multinucleated fibers; voluntary.

  • It is responsible for overall body mobility. It can contract rapidly, but it tires easily and must rest after short periods of activity.

  
• Skeletal muscle

  • Structure appear to be striated (banded); cells are large long , and cylindrical, with many nuclei
  • Function movement of body under voluntary control
  • Location attached to bone or connective tissue
• Cardiac Muscle

  • Found in the myocardium of the heart, and its ‘involuntary’ action is responsible for the pumping of blood.

  • It is innervated by the regular pacemaker activity of the sino-atrial node.

  • are cylindrical but much shorter than skeletal muscle cells.

  • is made up of a functional syncytium of cells that only have one nucleus (occasionally two), which is centrally localized.

  
• Cardiac muscle

  struc are cylindrical and striated and have a single nucleus; they are branched and connected to one another by intercalated disks which contain gap junctions

  func pumps blood involuntary

  location the heart
• Smooth Muscle

  • It contains spindle - shaped cells, with a central nucleus, that are connected together in a functional syncytium; Involuntary.

  • It is found in the walls of hollow visceral organs, such as the stomach, urinary bladder, and respiratory passages.

  • Its role is to force fluids and other substances through internal body channels.

  
• Fibrocartilage

  
• Bone tissue (osseous tissue)

  
• Blood