Cartilage and its types
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CARTILAGE AND ITS TYPESPresented by:Amna Nasir
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WHAT IS CARTILAGE?
Connective tissue Composed of:
Cells-Chondrocytes Fibers-Collagen
Embedded in gel like matrix: Mucopolysaccharide provides nutrition
Much elastic than bone
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GENERAL FEATURES
Avascular-no blood vessels Nutrients diffuses through
matrix(mucopolysachride) No nerves-Insensitive Surrounded by:
Perichondrium: Similar to periosteum in structure and function Absent in articular cartilage-no regeneration after
injury
Gets calcified Chondrocytes die and is replaced by bone
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COMPARISON BETWEEN BONE AND CARTILAGE
Bone• Hard• Inflexible• Calcium salts present• Vascular• Bone marrow is present
Cartilage• Firm• Flexible• Calcium salts absent• Avascular• Bone marrow is absent
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TYPES OF CARTILAGEThere are three types of cartilage:
Hyaline cartilage Fibrocartilage Elastic cartilage
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HYALINE CARTILAGE
Most abundant Highest water content Has perichondrium
Except articular cartilage Bluish white colour and is flexible Shiny and translucent-allow light to ass
through Very thin fibers Found in:
Articular cartilage of long bones Sternum and ribs Nasal cartilage Laryngeal cartilage
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HYALINE CARTILAGE
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FIBROCARTILAGE
Glistering white colour Opaque Numerious white fibers Most firm Found in:
Intervertebral disc Temporo-mandibular joints Sterno-clavicular joints
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EXAMPLES OF FIBROCARTILAGE
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ELASTIC CARTILAGE
Yellowish colour Opaque Numerious yellow fibers Most flexible Examples:
Ear pinna Epiglottis
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