SUPPORTIVE CONNECTIVE TISSUE Dr. Dalia Kamal Eldien

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.


FUNCTIONS OF SUPPORTIVE CONNECTIVE TISSUE

Support

Protection

Storage of minerals (calcium and phosphorus)

Site for HematopoiesisHematopoiesis (red bone marrow )



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.


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


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.


Types:

• Hyaline• Elastic• Fibrocartilage


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 )


HYALINE CARTILAGE

FunctionFunction

• Supports and reinforcesSupports and reinforces

• Acts as a cushionActs as a cushion

• Resists repetitive stressResists repetitive stress

Hyaline cartilage


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


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


LocationLocation

• Supports external earSupports external ear

• EpiglottisEpiglottis


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


LocationLocation

• Inter vertebral discsInter vertebral discs

• Discs of knee jointDiscs of knee joint

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SUPPORTIVE CONNECTIVE TISSUE Dr. Dalia Kamal Eldien