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Messenchyme (Connective tissue (bone (Hard calcified matrix containing…

- - - - dense irregular
        
        Able to withstand tension exerted in many directions
        
        Primarily irregularly arranged collagen fibers
        
        Major cell type is fibroblast
        
        Found in the dermis of the skin
        
        Provides structural strength
      - dense regular
        
        Attaches muscles to bones or to other muscles
        
        Primary parallel collagen fibers
        
        Tendons, most ligaments
        
        Major cell type is fibroblast; few elastic fibers
        
        Withstands great tensile stress when pulling forces is applied in one direction
      - Elastic
        
        Allows recoils of tissue following stretching
        
        Maintains pulsatile flow of blood through arteries
        
        Walls of large arteries; within the walls of bronchial tubes
        
        Dense regular connective tissue containing high proportion of elastic fibers
    - - reticular
        
        Fibers form a soft internal skeleton that supports other cell types
        
        Network of reticular fibers in a typical loose ground substance
        
        Found in lymphoid organs (lymph nodes, bone marrow, and spleen
      - adipose
        
        provides reserve fuel
        
        Under the skin; around kidneys and eyeballs
        
        Within abdomen; in breasts
        
        Closely packed adipocytes, or fat cells
        
        Insulates against heat loss and protects organs
      - areolar
        
        gel like matrix with all three fiber types
        
        wraps and cushions organs
        
        widely distributed under epithelia of body
        
        Cells: fibroblast, macrophages, mast cells, and some white
        
        Plays important role in inflammation
  - - - Covers the ends of long bones in joint cavities
      - Amorphous but firm matrix
      - supports and reinforces; serves as resilient cushion; resists compressive stress
      - Forms costal cartilages of the ribs
      - Cartilages of the nose, trachea, and larynx
    - - Similar to hyaline cartilage, but more elastic fibers in matrix
      - Maintains the shape of a structure while allowing great flexibility
      - Supports the external ear
    - - Matrix similar to but less firm than matrix in hyaline cartilage
      - Tensile strength with ability to absorb compressive shock
      - Found between vertebrae