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Connective tissues

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이 집합의 용어 (14)

  • For learning

    • Variations in blood supply

      • Some tissue types are well vascularized others or poor

      • Some are poor vascularized or are avascular

    • Extracellular matrix

      • Non-living material that surrounds living cells

    • Ground substance—mostly water along with adhesion proteins and polysaccharide molecules

    Connective tissue

  • Builders

    It synthesizes and secretes collagen, elastin, and the extracellular matrix, This forms the structural framework that holds your organs, skin, and muscles.

    Fiberblasts

  • Demoliton

    It breaks down and reabsorbs old damaged collagen fibers and matrix material using specialized enzymes ( like gollagenase)

    Fibroclasts

  • For learning

    A non-living meterial made of fibers and fluid that surrounds, holds, and supports living cells.

    Matrix

    • Composed of

      • Bone cells in lacunae (cavities)

      • Hard matrix of calcium salts

      • Large numbers of collagen fibers

      • well vascularized

    • Functions to protect and support the body; support leverage for the muscles to act on.

    Bone (osseous tissue)

    • Most common type of cartilage

      • Composed of: Abundant collagen fibers and a Rubbery matrix

      • Locations:

        • Larynx, trachea, cartalage of the nose, and the costal cartalage of the ribs.

        • Entire fetal skeleton prior to birth

      • Functions as a more flexible skeletal element than bone anc reinforces

    Hyaline cartilage

    • simular to hyaline cartalage, but more elastic fibers in matrix

    • Provides elasticity

    • Location

      • Supports the external ear

    • Function: Maintains the shape of a structure while allowing great flexability

    Elastic cartilage

    • Matrix simular but less firm then in hyaline cartilage; thick collagen fibers predominate

    • Highly compressible

    • Location

      • Forms cushion-like discs between vertebrae

    • Function: Tensile strength with the ability to absorb compressive shock

    Fibrocartilage

    • Main matrix element is collagen fiber

    • Fibroblasts are cells that make fibers

    • Locations

      • Tendons—attach skeletal muscle to bone

      • Ligaments—attach bone to bone at joints

      • Dermis—lower layers of the skin

    • Function: Attach muscles to bone or to other muscles; Attaches bone to bone:.

    Dense connective tissue (dense fibrous tissue)

    1. Areolar tissue

    2. Adipose tissue

    3. Reticular connective tissue

    • Loose connective tissue types

    • Has a gel-like matrix with all three fiber types

    • Most widely distributed connective tissue

    • Soft, pliable tissue like “cobwebs”

    • Functions as a packing tissue

    • Contains all fiber types

    • Can soak up excess fluid (causes edema)

    Ariolar Tissue

    • Matrix is an areolar tissue in which fat globules predominate, but very sparse, closely packed adipocytes, or fat cells

    • Many cells contain large lipid deposits

    • Location: Under skin, around kidneys, eyeballs, in bones

    • Functions

      • Insulates the body

      • Protects some organs

      • Serves as a site of fuel storage

    Adipose Tissue

    • Delicate network of interwoven fibers

    • network of rectangular fibers in a sypical loose ground substance

    • Locations

      • Forms stroma (internal supporting network) of lymphoid organs

        • Lymph nodes

        • Spleen

        • Bone marrow

    • Function: fibers form a soft internal skeleton that supports other cell types

    Reticular connective tissue

    • Red and white blood cells surrounded by fluid matrix called blood plasma

    • Fibers are visible during clotting

    • Location: in blood vessels

    • Functions as the transport vehicle for materials

    • Function: transport of respiratory gases, nutrians, wastes, and other substances

    • Blood (vascular tissue)