cartilage and its types
TRANSCRIPT
CARTILAGE AND ITS TYPESPresented by:Amna Nasir
WHAT IS CARTILAGE?
Connective tissue Composed of:
Cells-Chondrocytes Fibers-Collagen
Embedded in gel like matrix: Mucopolysaccharide provides nutrition
Much elastic than bone
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
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
TYPES OF CARTILAGEThere are three types of cartilage:
Hyaline cartilage Fibrocartilage Elastic cartilage
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
HYALINE CARTILAGE
FIBROCARTILAGE
Glistering white colour Opaque Numerious white fibers Most firm Found in:
Intervertebral disc Temporo-mandibular joints Sterno-clavicular joints
EXAMPLES OF FIBROCARTILAGE
ELASTIC CARTILAGE
Yellowish colour Opaque Numerious yellow fibers Most flexible Examples:
Ear pinna Epiglottis