Chapter 5 Cartilage PDF
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Uploaded by ArdentConceptualArt
Horus University
Dr/ Ghada Mohamed
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Summary
This document delves into the structure and functions of cartilage, including different types, cells, fibers and various characteristics. It provides a detailed overview of its origins and locations. The document is well-structured based on definitions, types, structure and sites. This makes it useful for medical and other biological study purposes.
Full Transcript
CARTILAGE DR/ Ghada Mohamed Chapter 5: Cartilage Define - Type of C.T but rubbery and firm - Contain cells, fibres & matrix. - Avascular → receive nutrient from perichondrium (Outer fibrous layer) by diffusion. T...
CARTILAGE DR/ Ghada Mohamed Chapter 5: Cartilage Define - Type of C.T but rubbery and firm - Contain cells, fibres & matrix. - Avascular → receive nutrient from perichondrium (Outer fibrous layer) by diffusion. Types Calcified according to fibres into Three types Hyalin, elastic & fibrocartilaginous 1- Hyaline cartilage 1- Outer covering → perichondrium 2- Cells 3- fibres 4- matrix 1- Perichondrium (bone )زي ال Formed of 1- Outer fibrous layer -→ contain type I collagen fibres+ fibroblast + Blood vessels. 2- Inner cellular (chondrogenic) layer→ rich in chondroblast. 2- Cells Chondrogenic Chondroblast Chondrocyte Origin UMCs UMCs or chondrogenic Chondroblast Site Inner cellular layer of Inner cellular layer of All over cartilage Structure perichondrium perichondrium single or group LM شكل خليه Flat cell Oval cell Oval cell شكل النواه Flat N Pale oval N Dark central round N لون Basophilic Dark basophilic Pale basophilic سيتوبالزم EM ثالثي المرح more ثالثي المرح Less ثالثى المرح + Ribosomes Function Differentiated into 1- Form cartilage. 1- Continuous chondroblast 2- Form Type II formation of collagen fibres. matrix 3- Form matrix. 2- Interstitial 4- Transformed to growth chondrocytes when اكتبو معايا surrounded by matrix. 5- Appositional growth افهم معايا 3- Matrix Rubbery + Basophilic → due to chondroitin sulphate. 4- Fibres Type II collagen fibres in matrix Sites 1- Costal cartilage 2- Articular cartilage 3- Trachea + bronchi 2- Yellow Elastic cartilage Define Flexible type of cartilage + yellow in fresh sections Structure Same as hyalin cartilage + more elastic cartilage in matrix Sites 1-Ear pinna 2-External auditory meatus 3- Eustachian tube 4- Epiglottis 3- White fibrocartilaginous Define Rigid type of cartilage + intermediate between cartilage and white fibrous CT Structure 1- Has no perichondrium 2- Matrix contain collagen type I with rows of chondrocyte in between. Site 1- Symphysis pubis 2- Intervertebral disc 3-Mandibular joint 1
