CONNECTIVE TISSUE

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CONNECTIVE TISSUE

• -is found everywhere in the body
• -is the most abundant type of tissue

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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

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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

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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

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FIBROUS TISSUE
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CONNECTIVE TISSUE

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

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CONNECTIVE TISSUE

• Reticular Fibers- thin branching shape which
  resists physical stress

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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

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OSTEOUS TISSUE SLIDES
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Types of Connective Tissue

• Spongy bone not as densely packed- contain
  spaces that are filled with blood- called red
  marrow

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BONE TISSUE

• Matrix is deposited in thin, bony plates called
  SPICULES around the red marrow

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Types of Connective Tissue

• Cartilage- small cell- CHONDROCYTE located in a
  lacunae produces the matrix. It is less hard and
  more flexible than bone.

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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

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3 Types of CARTILAGE

• 2. FIBROCARTILAGE- HIGHLY COMPRESSIBLE-
  cushion-like discs between vertebrae

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3 Types of CARTILAGE

• 3. ELASTIC CARTILAGE external ear, nose and
  epiglottis-some chondroitin sulfate

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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

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Dense Connective Tissue-
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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)

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Types of Connective Tissue

• ADIPOSE- designed to store fat- intercellular
  material is minimal- filled with triglycerides

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Types of Connective Tissue

• BLOOD- considered connective tissue because of
  nonliving fluid matrix called blood plasma