Skeletal tissues

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Skeletal tissues

• Classification and functions
• Chondroid tissue cells, inter-cellular substance
• Histogenesis of cartilages
• Cartilages
• a) hyaline
• b) elastic
• c) fibrocartilage
• 5. Bony tissue cells, intercellular substance
• 6. Fibrous bones
• 7. Lamellar bones
• 8. Long bones
• 9. Osteogenesis

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Skeletal tissues

• Chondroid tissue
• Hyaline
• Elastic
• Fibrocartilage
• Bony tissue
• Fibrous bone
• Lamellar bone a) cancellous
• b) compact

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Functions

• 1. Supportive
• 2. Mechanical
• 3. Protective
• 4. Ca and P deposition
• 5. Water-mineral metabolism

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Chondroid tissue

• Cells intercellular substance (chondromucoid,
  chondrine fibers)
• 1. Has no vessels
• 2. Intercellular components are predominant
• 3. Chondromucoid
• 70-80 H2O
• 10-15 org.
• 4-7 mineral
• 4. Chondrine fibers
• Collagen II
• Elastic

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Chondroid tissue differon

• I Stem cell
• II Hemistem cells
• III Chondroblasts
• IV Chondrocytes
• Chondroclasts

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Differonstem cell hemistem cell chondroblasts
chondrocytes
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Cartilage
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Hyaline cartilage
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Elastic cartilage Resorcin stain
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Fibrocartilage
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Bony tissuecells matrix(osteoidossein
fiberssalts)

1. Supports fleshy structures
2. Protects organs
3. Harbors the bone marrow
4. Storage of Ca and P
5. Multiply the forces of skeletal muscle contraction

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Osteocyte
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Osteoclast
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Bones 1. Fibrous2. Lamellar (compact and
cancellous)
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Diaphysis
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Haversian system
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Histogenesis1. Intramembranous2. Endochondral
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1. Osteogenic islet2. Osteoid stage3. Salts
impregnation4. Replacement by lamellar bone
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Endochondral histogenesis
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Endochondralossification

• 1. Cartilage model
• 2. Perichondral ossification
• 3. Endochondral ossification
• 4. Epiphyseal ossification

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Epiphyseal plate
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Regeneration
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Joint
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Joint
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Regulation