Musculosketetal system

  1. What is bone
    A rigid type of connective tissue
  2. What is an osteon
    The basic unit of the skeleton
  3. What are the types of cells in the bone?
    • Osteoblasts
    • Osteocytes
    • Osteoclasts
  4. What gives the bone its rigidness and strength?
    The extracellular matrix that surrounds the cells found within the bone
  5. What are osteoblasts? What do they secrete/create
    the cells responsible for building the bone. They secrete organic matter such as collagen and are responsible for creating the extracellular matrix
  6. What is the extracellular matrix composed of?
    An organic part (collagen) and inorganic part (hydroxyapatite crystals)
  7. What is the hydroxyapatite made up of?
    Calcium, Phosphate, and hydroxide ions
  8. What does collagen provide the bone?
    tensile strength
  9. What do hydroxyapatite crystals provide?
    Compressive strength
  10. What is the most common cell in the bone?
    Responsible for obtaining nutrients from the blood that is needed by the bone.
  11. What are the extensions in osteocytes called
    They are called processes that extend into canals called canaliculi they are used to exchange materials between different osteocytes.
  12. What is the job of osteoclasts?
    Their cells responsible for reabsorbing bone
  13. What does an osteon consist of?
    Concentric rings called lamellae-formed by osteoblasts

    In the center is a canal called the haversion canal
  14. What is the haversion canal used for?
    Contains the blood vessels, lymph vessels, and neurons
  15. What connects the haversion canals?
    The volkmann's canal
  16. How many types of bones are there
    5 types
  17. What are the three different regions in the long bone?
    Epiphysis, Metaphysis, and diaphysis
  18. What types of cartilage help connect bone to joints?
    Hyaline cartilage
  19. What is the epiphysis made up of?
    • Spongy tissue-resembles a honeycomb
    • contains red bone marrow
  20. What does redbone marrow do?
    Produces blood cell via the processes of hematoipoiesis
  21. What region in the Metaphysis causes growth?
    The region of hyaline tissue known as epiphyseal plate vis the endochondral ossification process
  22. What is in the diaphysis?
    The medullary cavity (innermost bone) compact bone which contains yellow bone marrow that stores adipose tissue
  23. Explain more about the compact bone
    It is very dense and gives the bone its strength compressive and tensile and consists of osteons
  24. What is the endosteum
    the inner covering of the bone
  25. What is the Periosteum?
    the membranes covering found on the outermost portion of the bone

    Protects the bone, serves as an attachment site for muscles vis tendons also contain cells that differentiate into osteoblasts
  26. What controls the somatic nervous system
    the somatic nervous system
  27. What is the extracellular matrix
    A composition of molecules and fibers that hold the cells together
  28. What are the 3 types of joints?
    Fixed, cartilaginous and synovial
  29. Describe a fixed joint?
    An immovable joint that connects bone to bone. It holds them together tightly in place
  30. Where do you find fixed joints?
    In the skull
  31. Describe the synovial joint
    Consists of a cavity that contains the synovial fluid. Provides a wide range of movement to the connecting bone
  32. describe the synovial fluid
    Nourishes the cartilage and contains macrophages to digest bacteria
  33. Describe the cartilaginous joint?
    Allows very little movement and made entirely of cartilage. Its found in the rib cage and pubic symphysis. allows movement for respiration
Card Set
Musculosketetal system