1. Quick Quiz Identify the types of epithelial tissue below: hint- look at the surface cells A B C D

2. Tissues: Connective Tissue Chapter 3

3. Connective Tissue Slide 3.53 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Found everywhere in the body  Includes the most abundant and widely distributed tissues  Functions  Binds body tissues together  Supports the body  Provides protection

4. Connective Tissue Characteristics Slide 3.54 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Variations in blood supply  Some tissue types are well vascularized  Some have poor blood supply or are avascular  Extracellular matrix  Non-living material that surrounds living cells

5. Extracellular Matrix Slide 3.55 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Two main elements  Ground substance – mostly water along with adhesion proteins and polysaccharide molecules  Fibers  Produced by the cells  Three types  Collagen fibers  Elastic fibers  Reticular fibers

6. Connective Tissue Types Slide 3.56 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Bone (osseous tissue)  Composed of:  Bone cells in lacunae (cavities)  Hard matrix of calcium salts  Large numbers of collagen fibers  Function: protect and support the body Figure 3.18a

7. Osseous Connective Tissue

8. Challenge Problem 1. ‘Oss’ at the beginning of a word means _______ 1. ‘Oss’ at the beginning of a word means _______ 2. Give three jobs of connective tissue 2. Give three jobs of connective tissue 3. _________ are the spaces in the extracellular matrix where bone cells live 3. _________ are the spaces in the extracellular matrix where bone cells live 4. What are some problems if ligaments rupture? 4. What are some problems if ligaments rupture?

9. Connective Tissue Types Slide 3.57 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Hyaline cartilage  Most common cartilage  Composed of:  Abundant collagen fibers  Rubbery matrix  Entire fetal skeleton is hyaline cartilage Figure 3.18b

10. Hyaline Cartilage

11. Connective Tissue Types Slide 3.58a Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Elastic cartilage  Provides elasticity  Example: supports the external ear

12. Elastic Cartilage

13. Connective Tissue Types Slide 3.58b Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Fibrocartilage  Highly compressible  Example: forms cushion-like discs between vertebrae Figure 3.18c

14. Fibrocartilage

15. Connective Tissue Types Slide 3.59 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Dense connective tissue  Main matrix element is collagen fibers  Cells are fibroblasts  Examples  Tendon – attach muscle to bone  Ligaments – attach bone to bone Figure 3.18d

16. Dense Connective Tissue

17. Connective Tissue Types Slide 3.60 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Areolar connective tissue  Most widely distributed connective tissue  Soft, pliable tissue  Contains all fiber types  Can soak up excess fluid Figure 3.18e

18. Areolar Connective Tissue

19. Connective Tissue Types Slide 3.61 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Adipose tissue  Matrix is an areolar tissue in which fat globules predominate  Many cells contain large lipid deposits  Functions  Insulates the body  Protects some organs  Serves as a site of fuel storage Figure 3.18f

20. Adipose Tissue

21. Challenge Problem 1. Identify one characteristic of areolar connective tissue. 1. Identify one characteristic of areolar connective tissue. 2. Adipose is also known as _____ 2. Adipose is also known as _____ 3. Muscle to bone= 3. Muscle to bone= 4. Bone to bone= 4. Bone to bone= 5. In which part of cells of adipose tissue are droplets of fat stored? 5. In which part of cells of adipose tissue are droplets of fat stored?

22. Connective Tissue Types Slide 3.62 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Reticular connective tissue  Delicate network of interwoven fibers  Forms stroma (internal supporting network) of lymphoid organs  Lymph nodes  Spleen  Bone marrow Figure 3.18g

23. Reticular Connective Tissue

24. Connective Tissue Types Slide 3.63 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Blood  Blood cells surrounded by fluid matrix  Fibers are visible during clotting  Functions as the transport vehicle for materials Figure 3.18h

25. Blood

26. Challenge Problem 1. Through which tissue does oxygen and carbon dioxide travel to get to all parts of the body? 2. The spleen and lymph nodes are made of _______ connective tissue. 3. In which organelle of cells of adipose tissue are droplets of fat stored? 4. What type of connective tissue are intervertebral discs made?

27. Quick Quiz Name two functions of Connective Tissue Name two functions of Connective Tissue