Focus: Identify the cells using the correct Epithelium classification:

Specialized Structures

Simple Squamous Epithelium

Simple Cuboidal

Simple Columnar

Goblet Cells in simple columnar

Pseudostratified Columnar

Stratified Squamous

Stratified squamous (Tongue)

Transitional Epithelium (Bladder)

Today’s Objectives Classify types of Connective Tissue Identify chief locations of each type of connective tissue Compare/Contrast connective tissue to epithelial tissue

Connective Tissue: Characteristics 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

Where located Commonly found under epithelium

Special Characteristics Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Variations in blood supply  vascularized  avascular  Extracellular matrix  Non-living material that surrounds living cells

Extracellular Matrix Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings  Two main elements  Ground substance – mostly water along with adhesion proteins and polysaccharide molecules  Fiber  Three types of fibers  Collagen fibers- thick, appear parallel, and are stron. Not stretchy  Elastic fibers- cells spaced apart, stretchy  Reticular fibers-

Connective Tissue Types-Lab Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings 1) Bone (osseous tissue)  Composed of:  Bone cells in lacunae (cavities)  Hard matrix of calcium salts (make rigid)  Large numbers of collagen fibers  Used to protect and support the body

Connective Tissue Types-Lab Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings 2) Hyaline cartilage  Most common cartilage  Composed of:  Abundant collagen fibers  Covers bone and joints  Entire fetal skeleton is hyaline cartilage Figure 3.18b

Connective Tissue Types-Lab Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings 3) Dense connective tissue  Main matrix element is collagen fibers  Cells are fibroblasts  Examples  Tendon – attach muscle to bone  Ligaments – attach bone to bone

Connective Tissue Types-Lab Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings 4.) 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

Connective Tissue Types-Lab Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings 5) Blood  Blood cells surrounded by fluid matrix  Fibers are visible during clotting  Functions as the transport vehicle for materials

Connective Tissue Types Slide 3.58a Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings 6) Elastic cartilage  Provides elasticity  Example: supports the external ear

Connective Tissue Types Slide 3.58b Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings 7) Fibrocartilage  Highly compressible  Example: forms cushion-like discs between vertebrae Figure 3.18c

Connective Tissue Types Slide 3.60 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings 8) Areolar connective tissue  Most widely distributed connective tissue  Soft, pliable tissue  Contains all fiber types  Can soak up excess fluid Figure 3.18e

Connective Tissue Types Slide 3.62 Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings 9) Reticular connective tissue  Delicate network of interwoven fibers  Forms stroma (internal supporting network) of lymphoid organs  Lymph nodes  Spleen  Bone marrow Figure 3.18g

Epithelial membranes - combinations of epithelial and connective tissues which have specific functions Serous membranes - combined simple squamous epithelium and areolar connective tissue. –Secretes serous fluid as a lubricant for sliding of the tissues. –Found as the pericardial sack which prevents friction when the heart beats, pleural membranes around the lungs,mesenteries attaching the intestines, peritoneum lining the abdominal cavity and covering its organs. Mucous membranes - combined of columnar (may be ciliated or p.c.c.e.) epithelium and areolar connective and smooth muscle. –Forms the structure of the GI and respiratory passageways. –Specialized glands, or cells called goblet cells, secrete mucus to protect the lining, lubricate the propulsion of food, and remove particulates form the respiratory tract.

Microscope Classification Lab #3 part two Each person should have a Hand out Match-the pictures to the correct slide ( label the correct type of connective tissue) Sketch-portion of tissue to show the structure Label- tissue type, power and Field Diameter Write-function and location of tissue in human body

Place the following in the correct place on the Ven Diagram 1.Cells packed together 2.Individual cells 3.Extracellular matrix 4.Throughout body 5.Protection 6.Binds tissue together 7.Support 8.Avascular 9.Vascular 10.Cover 11.Filler 12.Apical surface 13.Basement membrane Epithelial Tissue Connective Tissue

Cells packed together= epi Individual cells= conn Extracellular matrix= conn Throughout body= both Protection =both Binds tissue together= conn Support= both Avascular= both Vascular= Conn Cover= epi Filler= con Apical surface= epi Basement membrane= epi