musculoskeletal system

• The musculoskeletal system provides the body with movement, stability, shape, and support
• It is subdivided into two broad systems: the muscular system and the skeletal system
• Muscular system includes all types of muscles in the body, with skeletal muscles or voluntary muscles acting on body joints to produce movements
• The muscular system also contains tendons which attach muscles to bones
• Skeletal system's main component is bone, which articulates with each other to form joints, providing a hard-core yet mobile skeleton
• Accessory structures of the skeletal system that support the integrity and function of bones and joints include articular cartilage, ligaments, and bursae
• Smooth or involuntary muscles are found in the gut and blood vessels, involved in processes over which we have no conscious control
• Cardiac muscle is found in the heart, capable of strong, continuous, and rhythmic contractions
• Classification of joints:

  • Fibrous joints, also called immovable joints, where bones are fused together to create a structure, such as the skull
  • Cartilaginous joints have bones connected by flexible cartilage allowing some degree of movement, such as the rib cage
  • Synovial joints are the most common type, flexible and move in a range of different ways, such as the hip joint
• Functions of the musculoskeletal system include:

  • Blood production
  • Minerals
  • Movement and support
• Sliding Filament Theory:

  • Muscle contains two main proteins involved in muscle contraction: actin and myosin
  • Thick filaments contain myosin
  • Thin filaments contain actin
• Video link: Sliding Filament Theory Of Muscle Contraction Explained (youtube.com)