CSIRO Publishing blank image blank image blank image blank imageBooksblank image blank image blank image blank imageJournalsblank image blank image blank image blank imageAbout Usblank image blank image blank image blank imageShopping Cartblank image blank image blank image You are here: Journals > Australian Journal of Zoology   
Australian Journal of Zoology
Journal Banner
  Evolutionary, Molecular and Comparative Zoology
blank image Search
blank image blank image
blank image
  Advanced Search

Journal Home
About the Journal
Editorial Structure
Online Early
Current Issue
Just Accepted
All Issues
Special Issues
Sample Issue
For Authors
General Information
Author Instructions
Submit Article
Open Access
Awards and Prizes
For Referees
Referee Guidelines
Review an Article
Annual Referee Index
For Subscribers
Subscription Prices
Customer Service
Print Publication Dates

blue arrow e-Alerts
blank image
Subscribe to our Email Alert or RSS feeds for the latest journal papers.

red arrow Connect with us
blank image
facebook twitter LinkedIn


Article << Previous     |         Contents Vol 11(3)

Adventitious (Secondary) cartilage in the chick, and the development of certain bones and articulation in the chick skull.

PDF Murray

Australian Journal of Zoology 11(3) 368 - 430
Published: 1963


The development of a number of articulations in the chick embryo skull, and of adventitious (secondary) cartilages associated with them, is described. The cells of the adventitious cartilages differed from the hyaline cartilage of the chondrocranium in being encapsulated and rapidly becoming hypertrophic. In every case but one the adventitious cartilage was formed in direct association with an articulation. The articulations may have articular cavities (quadrate-quadratojugal; quadratepterygoid; pterygoid-cranium; squamosal-quadrate) or be without these (squamosalotic capsule; pterygoid-palatine; surangular- and angular-Meckel's cartilage). The adventitious cartilage developed in "germinal cells" which, immediately before the onset of chondrification, had been engaged in ossification. Later, the same group of cells often reverted to bone formation, and the adventitious cartilage became partly covered by bone. Where there were articular cavities, fibrous membranes lining the articulations appeared on each side of the cavity and these usually became fibrocartilaginous. These membranes continued into the fibrous layers of the periostea of the elements concerned, while the germinal cells from which the adventitious cartilages were formed became cambial layers continuous with the cambial layers of the periostea. Movement, and mechanical strains resulting from the action of muscles, is obvious at articulations having articular cavities. In those lacking articular cavities, the anatomy of the muscles makes it extremely probable that the site on the membrane bone is pulled upon, or moved against, the cartilage with which the articulation is made. The facts of the development of adventitious cartilage, and of the anatomy of the musculature, are in harmony with the hypothesis that the change in morphogenetic direction of the germinal cells, from osteogenesis to chondrogenesis, is mechanically induced.

Full text doi:10.1071/ZO9630368

© CSIRO 1963

blank image
Subscriber Login

PDF (7.5 MB) $25
 Export Citation
Legal & Privacy | Contact Us | Help


© CSIRO 1996-2015