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CONNECTIVE TISSUE

Learn about connective tissue, its characteristics, types of fibers, and various examples like bone, cartilage, and blood. Discover the role of extracellular matrix and the importance of collagen, elastic, and reticular fibers.

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CONNECTIVE TISSUE

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  1. CONNECTIVE TISSUE -is found everywhere in the body -is the most abundant type of tissue

  2. CONNECTIVE TISSUE • Common Characteristics- 1. most are well vascularized (have a good blood supply) exceptions are tendons and ligaments 2. functions include protecting, supporting, and binding together other tissues 3. contain EXTRACELLULAR MATRIX

  3. CONNECTIVE TISSUE • Extracellular Matrix- secreted by the cell-the more matrix the stronger the tissue- ( can vary from strong bone to clear lens of the eye) CONTAINS 1. Water 2. Various proteins- “glue” 3. Polysaccharides- “rigidity” 4. 3 main Types of fibers

  4. CONNECTIVE TISSUE • Collagen Fiber- (white) most abundant type of protein fiber in the matrix. Thick wavelike strands which is flexible but resists stretching. (tendons) Also, the main unit for tissue repair. If you have a scar you notice how little it stretches but how tightly it binds the skin together

  5. FIBROUS TISSUE

  6. CONNECTIVE TISSUE • Elastic Fibers- not as strong as collagen and in much thinner fibers. Ability to stretch and return to original shape

  7. CONNECTIVE TISSUE • Reticular Fibers- thin branching shape which resists physical stress

  8. Types of Connective Tissue Bone-“osseous tissue” • Small cell “OSTEOCYTE” located in a LACUNAE- hollow cavity- surrounded by many layers of calcium salts. • Compact bone- densely pact matrix of salts and collagen- nourishment must be provided to osteocytes by way of blood vessels that extend through bone in canals called “HAVERSIAN CANALS”

  9. OSTEOUS TISSUE SLIDES

  10. Types of Connective Tissue • Spongy bone – not as densely packed- contain spaces that are filled with blood- called red marrow

  11. BONE TISSUE • Matrix is deposited in thin, bony plates called SPICULES around the red marrow

  12. Types of Connective Tissue • Cartilage- small cell- “CHONDROCYTE” located in a lacunae produces the matrix. It is less hard and more flexible than bone.

  13. 3 Types of CARTILAGE 1. HYALINE CARTILAGE ( bluish-white) PROTECTIONS-forms supporting structures of larynx, attaches ribs, covers the ends of bones- dominated by the protein-sugar molecules of chondroitin sulfate

  14. 3 Types of CARTILAGE 2. FIBROCARTILAGE- HIGHLY COMPRESSIBLE- cushion-like discs between vertebrae

  15. 3 Types of CARTILAGE 3. ELASTIC CARTILAGE external ear, nose and epiglottis-some chondroitin sulfate

  16. Types of Connective Tissue • Dense Connective Tissue- protein fibers are packed tightly together with little space in between for other substances. Collagen fibers are most abundant. 1. Tendons – attach muscle to bones stronger than ligaments 2. Ligaments- attach bones to bones- more elastic than tendons

  17. Dense Connective Tissue-

  18. Types of Connective Tissue • Loose Connective Tissue- most widespread of all the tissues. Composed of all three types of fibers which are in a loose disorganized network surrounded by fluid. • AREOLAR TISSUE- universal packing tissue- appears cob web like- holds internal organs into position (mesentery)

  19. Types of Connective Tissue • ADIPOSE- designed to store fat- intercellular material is minimal- filled with triglycerides

  20. Types of Connective Tissue • BLOOD- considered connective tissue because of nonliving fluid matrix called “blood plasma”

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