ZOO 3000 Lecture Notes - Lecture 4: Haversian Canal, Intramembranous Ossification, Fibroblast

• School: University of Guelph
• Department: Zoology
• Course: ZOO 3000
• Professor: Fred Laberge

Document Summary

Most of the cartilage is ossified and replaced by bone the forming skeleton of an embryonic chicken, stained to differentiate between hardened bone (red) and the still-unossified cartilage model (blue) Mesenchyme cells differentiate into chondroblasts chondroblasts secrete cartilage matrix and become encased in small cavities; lacunae embedded chondroblasts become chondrocytes, divide and produce more ground substance and fibers. 2) interstitial three types of cartilage new cartilage at the surface of existing cartilage derived from perichondrium new cartilage within existing cartilage distinguished by fibrous matrix composition. 3) fibrocartilage hyaline cartilage from hyalos - greek for glass translucent when fresh function? low frictional surface flexibility cushioning. ___________ chondrocytes in lacunae; darker near lacunae because secreted proteoglycans are basophilic bone. Matrix is mostly water, and contains type ii collagen, proteoglycans and. Where? support with flexibility and elasticity external ear, epiglottis of larynx chondrocytes.