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  • 1. BY: Andrew Choe, Aviance Mckenzie, Jenna Goins, Centeria Lee
  • 2. Function Binds structures Provides support and protection Serves as framework Fills spaces Stores fat Produces red blood cells Protects against infections
  • 3. Extracellular Matrix Nickname: ECM It has molecules that modify tissues to suit different organs. Composed of protein fibers, a ground substance consisting of non-fibrous proteins and other molecules, and fluid. Can be fluid, semi fluid, or solid.  Bone and cartilage are solid
  • 4. Major cell types Fibroblasts • Macrophages (histiocytes)  Star shaped •Originate as white blood cells  Produces fibers by •Specialized to carry on secreting proteins into the phagocytosis ECM. •Can move as a  Most common type. scavenger and defensive cells that clear foreign particles from tissue
  • 5. Major Cell Types Mast Cells  Large and widely distributed in connective tissue  Usually near blood vessels  Release heparin and histamine
  • 6. Connective Tissue Fibers Collagenous (white fiber)  Thick thread of protein collagen  Long and parallel bundles  Hold ligaments and tendons together  Most abundant type of dense connective tissue Elastic (yellow fibers)  Protein named elastin  Thin fiber branches with complex networks  Common in body parts that stretch Reticular  Thin highly branched  Delicate supporting networks and many tissues
  • 7. Categories of Connective Tissue Connective Tissue Proper  Loose connective tissue  Dense connective tissue Specialized Connective Tissue  Cartilage  Bone  Blood
  • 8. Loose Connective Tissue Areolar  Fibroblasts  Binds skin to sub- organs  Fills spaces between muscles Adipose (fat)  Develop when cells store fat as droplets and enlarge Reticular  Collagenous Fibers  Provide framework for some organs
  • 9. Dense Connective Tissue Composed of both collagenous and elastic fibers Has few cells (mostly fibroblasts) Strong (withstand pulling forces) (parts of tendons and ligaments) Poor blood supply causes slow tissue repair
  • 10. Cartilage Provides support, framework, and protects underlying tissue Cartilage ECM is abundant of collagenous fibers Chondrocytes - cartilage cells Occupy laucnae Enclosed in perichondrium
  • 11. Types of Cartilage Hyaline cartilage  Most common  Fine collagenous fibers  Found on bones and many joints  Important in development of bones Elastic cartilage  Dense network  Flexible  Provides framework for ears and larynx Fibrocartilage  Tough  Many collagenous fibers  Shock absorber
  • 12. Assessment
  • 13. Bone Supports, protects, provides framework Used in bones of the skeleton Hard because of mineral salts Contains red marrow Stores and releases inorganic chemicals Bone matrix composed of lamellae Forms central canals Osteocytes Forms Ostion
  • 14. Blood Transports a variety of materials Helps maintain internal environment conditions Composed of formed elements an blood plasma Red and white blood cells Platelets Most form in red marrow