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SECTION 4-3 Connective Tissues

SECTION 4-3 Connective Tissues. Connective tissue functions:. Establishing a structural framework Transporting fluids and dissolved materials Protecting delicate organs Supporting, surrounding and interconnecting tissues Storing energy reserves Defending the body from microorganisms.

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SECTION 4-3 Connective Tissues

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  1. SECTION 4-3Connective Tissues

  2. Connective tissue functions: • Establishing a structural framework • Transporting fluids and dissolved materials • Protecting delicate organs • Supporting, surrounding and interconnecting tissues • Storing energy reserves • Defending the body from microorganisms

  3. Figure 4.8 A Classification of Connective Tissues Figure 4.8

  4. Connective tissues contain • Specialized cells • Matrix • Composed of extracellular protein fibers and a ground substance

  5. Connective tissue proper • Contains varied cell populations • Contains various fiber types • A syrupy ground substance

  6. Fluid connective tissue • Contains a distinctive cell population • Watery ground substance with dissolved proteins • Two types • Blood • Lymph

  7. Supporting connective tissues • Less diverse cell population • Dense ground substance • Closely packed fibers • Two types • Cartilage • Bone

  8. Connective tissue proper • Contains fibers, a viscous ground substance, and a varied cell population • Fibroblasts • Macrophage • Adipocytes • Mesenchymal cells • Melanocytes • Mast cells • Lymphocytes • Microphages

  9. Connective tissue proper • Three types of fiber • Collagen fibers • Reticular fibers • Elastic fibers

  10. Connective tissue proper • Classified as loose or dense • Loose • Embryonic mesenchyme, mucous connective tissues • Areolar tissue • Adipose tissue • Reticular tissue • Dense • Dense regular CT • Dense irregular CT

  11. Figure 4.9 The Cells and Fibers of Connective Tissue Proper Figure 4.9

  12. Figure 4.10 Connective Tissue in Embryos Figure 4.10

  13. Figure 4.11 Adipose and Reticular Tissues Figure 4.11

  14. Figure 4.12 Dense Connective Tissues Figure 4.12a

  15. Figure 4.12 Dense Connective Tissues Figure 4.12b

  16. Figure 4.12 Dense Connective Tissues Figure 4.12c

  17. Chapter 4, part 3 The Tissue Level of Organization

  18. Fluid connective tissues • Distinctive collections of cells in a fluid matrix • Blood • Formed elements and plasma • Red blood cells, white blood cells and platelets • Arteries carry blood away, veins carry to the heart • Capillaries allow diffusion into the interstitial fluid • Lymph • Interstitial fluid entering the lymphatic vessels

  19. Figure 4.13 Formed Elements of the Blood Figure 4.13

  20. Supporting connective tissues—a look ahead… • Cartilage and bone support the rest of the body • Cartilage • Grows via interstitial and appositional growth • Matrix is a firm gel containing chondroitin sulfate • Cells called chondrocytes • Cells found in lacunae • Perichondrium separates cartilage from surrounding tissues • Three types: hyaline, elastic and fibrocartilage

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