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Connective Tissue

Connective Tissue. Thursday, September 5 th. What is connective tissue?. Forms a framework upon which epithelial tissue rests Also contains nerve and muscle tissue Is THE most abundant tissue type Classified more by the material in which the cells lay (extracellular matrix).

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Connective Tissue

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  1. Connective Tissue Thursday, September 5th

  2. What is connective tissue? • Forms a framework upon which epithelial tissue rests • Also contains nerve and muscle tissue • Is THE most abundant tissue type • Classified more by the material in which the cells lay (extracellular matrix)

  3. What is connective tissue? • Functions • Mechanical support for other tissues • Avenue for communication and transport among other tissues • The site of inflammation

  4. What is connective tissue? • Extracellular matrix • Tissue made of different cells and different amounts of nonliving substances outside of cell • Variations in blood supply • Overall it has good blood supply, but there are a few exceptions • Avascular: ligaments, tendons, cartilage

  5. What is connective tissue? • 3 Types of Fibers • White – strong and stretchy protein • Collagen • Yellow – more elastic but weaker protein • Elastin • Reticular – really thin fibers that provide support

  6. How is connective tissue classified? • Classes • Bone • Cartilage • Dense connective tissue • Loose connective tissue (Areolar) • Adipose • Reticular • Blood

  7. Bone Tissue • Exceptional ability to protect & support • Stores calcium and fat • Site for muscle attachment • Marrow is the site of blood production • 2 types • Cancellous – spongy bone • Compact – no space between

  8. Bone Tissue Figure 4.12j

  9. Cartilage • Small cells, sit in a lacuna • Hyaline cartilage • Less hard, more flexible • Most abundant • Ex: fetus skeleton • Fibrocartilage • Thick collagen fibers • Ex: disks in vertebral column • Elastic cartilage • Shape bounces back • Ex: external ear

  10. Hyaline Cartilage Figure 4.12g

  11. Fibrocartilage Figure 4.12i

  12. Elastic Cartilage Figure 4.12h

  13. Connective Tissues • 2 Types • Dense • Tendons – connect muscle to bone • Ligaments – connect one bone to another • Loose • Areolar – “cobwebs”, soft, pliable, protects the body organs as it wraps • Adipose – “fat”, insulation, abundant • Reticular – internal supporting framework (blood cells, spleen, bone marrow)

  14. Dense Connective Tissue Figure 4.12f

  15. Areolar Connective Tissue Figure 4.12b

  16. Adipose Tissue Figure 4.12c

  17. Reticular Connective Tissue Figure 4.12d

  18. Blood Tissue • Atypical as far as connective tissue • No fibers, highly fluid • Transports O2 and CO2 • Vascular • It has blood cells surrounded by nonliving fluid called plasma

  19. Blood Tissue Figure 4.12k

  20. Blood Tissue • Plasma contents • Red blood cells: erythrocytes • White blood cells: leukocytes • Platelets: thrombocytes • Also carries nutrients (sugars, amino acids, fats, salts), antibodies, clotting proteins, hormones

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