supportive connective tissue dr. dalia kamal eldien
TRANSCRIPT
SUPPORTIVE CONNECTIVE SUPPORTIVE CONNECTIVE TISSUETISSUE
Dr. Dalia Kamal EldienDr. Dalia Kamal Eldien
Connective tissue proper Fluid connective tissue Supporting connective tissue
Connective Tissue
Dense connectivetissue
Loose connectivetissue
Lymph Cartilage BoneBlood
What are the subcategories of the three main categories of connective tissue?
SUPPORTIVE CONNECTIVE TISSUE
DEFINITION
The tissue that support and makes the framework of body is called supportive connective tissue.
Types
Supportive connective tissue is of two types:
1. Cartilage
2. Bone
Together bones and cartilage make up the skeleton.
SUPPORTIVE CONNECTIVE TISSUE
FUNCTIONS OF SUPPORTIVE CONNECTIVE TISSUE
Support
Protection
Storage of minerals (calcium and phosphorus)
Site for HematopoiesisHematopoiesis (red bone marrow )
SUPPORTIVE CONNECTIVE TISSUE
SUPPORTIVE CONNECTIVE TISSUE
CARTILGE:CARTILGE: is a flexible connective tissue found in many is a flexible connective tissue found in many
areas in the bodies of humans and other areas in the bodies of humans and other animals, including the joints between bones, animals, including the joints between bones, ribs, ear, nose, bronchial tubes and the ribs, ear, nose, bronchial tubes and the intervertebral discs.intervertebral discs.
It is not hard and rigid as bone but is stiffer It is not hard and rigid as bone but is stiffer and less flexible than muscle.and less flexible than muscle.
Constituents of cartilage:Constituents of cartilage: It is made up of It is made up of cellscells called called chondroblastschondroblasts
and and chondrocyteschondrocytes,, (chondro - cartilage) (chondro - cartilage) andand extracellular matrixextracellular matrix..
Extracellular matrix Extracellular matrix made up about made up about 10% 10% aggrecanaggrecan, 75% , 75% waterwater, and a mix , and a mix of of collagen fiberscollagen fibers and elastic fibers in varying and elastic fibers in varying proportions based on local biomechanical needs proportions based on local biomechanical needs of the organs in which it is located.of the organs in which it is located.
SUPPORTIVE CONNECTIVE TISSUE
CARTILAGE FeaturesFeatures
• Flexible tissueFlexible tissue
• Contains no blood vessels or nervesContains no blood vessels or nerves
• Matrix contains up to 80% waterMatrix contains up to 80% water
• Cell type Cell type – chondrocyte – chondrocyte
chondrocyteschondrocytes
chondrocyteschondrocytes
SUPPORTIVE CONNECTIVE TISSUE
Function of cartilage
• Supports soft tissue of the body.Supports soft tissue of the body.
• It provides smooth sliding surfaces in the joints to It provides smooth sliding surfaces in the joints to
facilitate bone movement.facilitate bone movement.
• Cartilage is essential for the growth of the long Cartilage is essential for the growth of the long
bones before and after birth.bones before and after birth.
SUPPORTIVE CONNECTIVE TISSUE
Types:
• Hyaline• Elastic• Fibrocartilage
SUPPORTIVE CONNECTIVE TISSUE
HYALINE CARTILAGE This type of cartilage has a glassy appearance This type of cartilage has a glassy appearance
when fresh, hence its name, as when fresh, hence its name, as hyaloshyalos is greek is greek for glassy. for glassy.
Hyaline cartilage has widely dispersed fine Hyaline cartilage has widely dispersed fine collagen fibers,which strengthen it collagen fibers,which strengthen it
it is the it is the weakestweakest of the three types of cartilage of the three types of cartilage.. DescriptionDescription
• collagen fiberscollagen fibers• Chondroblasts produce matrixChondroblasts produce matrix• Chondrocytes lie in lacunae (which accommodate Chondrocytes lie in lacunae (which accommodate
cartilage cells )cartilage cells )
SUPPORTIVE CONNECTIVE TISSUE
HYALINE CARTILAGE
FunctionFunction
• Supports and reinforcesSupports and reinforces
• Acts as a cushionActs as a cushion
• Resists repetitive stressResists repetitive stress
Hyaline cartilage
SUPPORTIVE CONNECTIVE TISSUE
LocationLocation
• Ends of long bonesEnds of long bones
• Costal cartilage of ribsCostal cartilage of ribs
• Cartilages of nose, trachea, and larynx LocationCartilages of nose, trachea, and larynx Location
SUPPORTIVE CONNECTIVE TISSUE
ELASTICELASTIC In In elastic elastic cartilage, the chondrocytes are found cartilage, the chondrocytes are found
in a threadlike network of elastic fibers within in a threadlike network of elastic fibers within the matrix.the matrix.
ElasticElastic cartilage provides strength, and cartilage provides strength, and elasticity, and maintains the shape of certain elasticity, and maintains the shape of certain structure such as the external ear.structure such as the external ear.
DescriptionDescription• Similar to hyaline cartilageSimilar to hyaline cartilage• More elastic fibers in matrixMore elastic fibers in matrix
Function Function • Maintains shape of structureMaintains shape of structure• Allows great flexibilityAllows great flexibility
Elastic cartilge
SUPPORTIVE CONNECTIVE TISSUE
LocationLocation
• Supports external earSupports external ear
• EpiglottisEpiglottis
SUPPORTIVE CONNECTIVE TISSUE
FIBROCARTILAGEFIBROCARTILAGEThis is the strongest kind of cartilage, because This is the strongest kind of cartilage, because
it has alternating layers of hyaline cartilage it has alternating layers of hyaline cartilage matrix and thick layers of dense collagen matrix and thick layers of dense collagen fibers oriented in the direction of functionalfibers oriented in the direction of functional
DescriptionDescription• Matrix similar, but less firm than hyaline Matrix similar, but less firm than hyaline
cartilagecartilage• Thick collagen fibers predominateThick collagen fibers predominate• Chondrocyte are lie in rows and isogenic groupsChondrocyte are lie in rows and isogenic groups
FunctionFunction• Tensile strength and ability to absorb Tensile strength and ability to absorb
compressive shockcompressive shock
Fibro cartilge
SUPPORTIVE CONNECTIVE TISSUE
LocationLocation
• Inter vertebral discsInter vertebral discs
• Discs of knee jointDiscs of knee joint
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