Isam zebeba cartilage Embryo



Download 0.76 Mb.
Page2/4
Date15.05.2018
Size0.76 Mb.
1   2   3   4

Elastic Cartilage



Fibrocartilage








  1. Hyaline cartilage: flexible and resilient

 Chondrocytes appear spherical

Lacuna – cavity in matrix holding chondrocyte

 Collagen the only fiber


  1. Elastic cartilage: highly bendable

 Matrix with elastic as well as collagen fibers

 Epiglottis and larynx



  1. Fibrocartilage: resists compression and tension

 Rows of thick collagen fibers alternating with rows of chondrocytes (in matrix)

 Knee menisci and annulus fibrosis of intervertebral discs


Growth of cartilage

  1. Appositional

 “Growth from outside”

 Chrondroblasts in perichondrium (external covering of cartilage) secrete matrix



  1. Interstitial

 “Growth from within”

 Chondrocytes within divide and secrete new matrix



  1. Cartilage stops growing in late teens (chrondrocytes stop dividing)

  2. Regenerates poorly in adults


Bones




  1. Share with your friends:
1   2   3   4


The database is protected by copyright ©dentisty.org 2019
send message

    Main page