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Connective Tissue (Classes : (Bone Tissue (Osseous tissue) (Stores fat and…

- - - - Elastic (ears and epiglottis): similar to hyaline but with more elastic fibers
      - Fibrocartilage (intervertebral discs and knee): properties between hyaline and dense regular tissue, strong
      - Hyaline (tips of long bones, nose, trachea, larynx, rib cartilage): most abundant; "gristle," appears as shiny bluish glass
  - - - Dense regular (tendons + ligaments(shoulder joint)): very high tensile strength, closely packed bundles of thick collagen fibers run parallel to direction of pull (white, slightly wavy to allow for a little bit of stretching but overall have great resistance to pulling), fibroblasts manufacture collagen fibers and ground substance - but mostly fibers, very few ground substance/cells, poorly vascularized
      - Dense irregular (dermis, fibrous joint capsules, fibrous coverings of some organs (also shoulder joint)): same elements as dense regular but bundles of collagen are thicker and irregularly arranged, form sheets rather than bundles, resit tension from many directions
      - Elastic (ligaments connecting adjacent vertebrae and walls of arteries to handle stretch to let blood in and recoil to push blood out)
    - - Reticular (spleen): resembles areolar tissue (but with thinner reticular fibers), fibroblast cells~reticular cells (secrete reticular fibers made up of thin collagen), form mesh-like stroma (support for blood cells in lymph nodes, spleen and bone marrow)
      - Adipose (breasts): composed of white fat and brown fat
        
        Brown fat: Use lipid fuels to heat bloodstream than produce ATP
        
        White fat: similar to areolar tissue but greater nutrient storage, cells=adipocytes, scanty matrix, richly vascularized, functions in shock absorption, insulation and energy storage
      - Areolar (lamina propria under epithelium): most widely distributed CT, supports and binds other tissues, universal packing material between other tissues, contains fibroblasts that secrete loose arrangement of mostly collagen fibers, loose fibers allow for increased ground substance (can act as water reservoir by holding more interstitial fluid), macrophages and fat cells are contained in these spaces
- - - - Components: interstitial fluid, cell adhesion proteins (glue), proteoglycans (sugar proteins) made up of protein core and large polysaccharides (hyaluronic acid), water also trapped in varying amounts affecting viscosity of ground substance