Quick Quiz Identify the types of epithelial tissue

Quick Quiz Identify the types of epithelial tissue below: hintlook at the surface cells n n A B n C n D

Tissues: Connective Tissue Chapter 3

Connective Tissue · Found everywhere in the body · Includes the most abundant and widely distributed tissues · Functions · Binds body tissues together · Supports the body · Provides protection Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 3. 53

Connective Tissue Characteristics · 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 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 3. 54

Extracellular Matrix · 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 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 3. 55

Connective Tissue Types · 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 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Figure 3. 18 a Slide 3. 56

Osseous Connective Tissue

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

Connective Tissue Types · Hyaline cartilage · Most common cartilage · Composed of: · Abundant collagen fibers · Rubbery matrix · Entire fetal skeleton is hyaline cartilage Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Figure 3. 18 b Slide 3. 57

Hyaline Cartilage

Connective Tissue Types · Elastic cartilage · Provides elasticity · Example: supports the external ear Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 3. 58 a

Elastic Cartilage

Connective Tissue Types · Fibrocartilage · Highly compressible · Example: forms cushion-like discs between vertebrae Figure 3. 18 c Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 3. 58 b

Fibrocartilage

Connective Tissue Types · Dense connective tissue · Main matrix element is collagen fibers · Cells are fibroblasts · Examples · Tendon – attach muscle to bone · Ligaments – attach bone to bone Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Figure 3. 18 d Slide 3. 59

Dense Connective Tissue

Connective Tissue Types · Areolar connective tissue · Most widely distributed connective tissue · Soft, pliable tissue · Contains all fiber types · Can soak up excess fluid Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Figure 3. 18 e Slide 3. 60

Areolar Connective Tissue

Connective Tissue Types · 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 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Figure 3. 18 f Slide 3. 61

Adipose Tissue

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

Connective Tissue Types · Reticular connective tissue · Delicate network of interwoven fibers · Forms stroma (internal supporting network) of lymphoid organs · Lymph nodes · Spleen · Bone marrow Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Figure 3. 18 g Slide 3. 62

Reticular Connective Tissue

Connective Tissue Types · Blood cells surrounded by fluid matrix · Fibers are visible during clotting · Functions as the transport vehicle for materials Figure 3. 18 h Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings Slide 3. 63

Blood

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

Quick Quiz n Name two functions of Connective Tissue