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Related Concept Videos

Development of the Limb Synovial Joints01:07

Development of the Limb Synovial Joints

Joints form during embryonic development in conjunction with the formation and growth of the associated bones. The embryonic tissue that gives rise to all bones, cartilage, and connective tissues of the body is called mesenchyme.
The mesenchymal stem cells differentiate into chondrocytes that form the hyaline cartilage, and later the cartilaginous model of the bone. This model further transforms into a bone. This process is known as endochondral ossification.
During development, the limbs...
Growth of Cartilage and Bone Tissue01:27

Growth of Cartilage and Bone Tissue

Chondrocytes form a temporary cartilaginous model by dividing and secreting a thick gel-like extracellular matrix. Once the chondrocytes undergo programmed cell death, osteoblasts enter the site of the cartilaginous model. The process of replacing the temporary cartilaginous model with bone in an ordered manner is called endochondral ossification. In endochondral ossification, not all of the cartilage is replaced by bone tissue. Some cartilage that performs a protective and supportive function...
Bone Formation by Endochondral Ossification01:24

Bone Formation by Endochondral Ossification

Bone formation, or ossification, begins around the sixth to seventh week of embryonic development. Most bones develop from a cartilaginous template through the process of endochondral ossification. Cartilage formation begins when clusters of mesenchymal cells differentiate into chondrocytes. These chondrocytes proliferate rapidly and secrete an extracellular matrix that becomes encased in a membrane called the perichondrium. The resulting cartilage model provides a template that resembles the...
Bone Remodeling and Repair01:31

Bone Remodeling and Repair

Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during bone...
Bone Formation by Intramembranous Ossification01:29

Bone Formation by Intramembranous Ossification

Intramembranous ossification is one of the two processes involved in the development of bones within an embryo. The flat bones of the face, most of the cranial bones, and the clavicles are formed via this process. During intramembranous ossification, the bones develop directly from sheets of undifferentiated mesenchymal connective tissue.
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into...
Structural Joints: Cartilaginous Joints01:17

Structural Joints: Cartilaginous Joints

As the name indicates, at a cartilaginous joint, the adjacent bones are united by cartilage, a tough but flexible type of connective tissue. Unlike synovial joints, these types of joints lack a joint cavity and involve bones joined together by either hyaline cartilage or fibrocartilage.
There are two types of cartilaginous joints:
Synchondrosis
A synchondrosis ("joined by cartilage") is a cartilaginous joint where bones are connected by hyaline cartilage. Synchondrosis may be temporary or...

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Related Experiment Video

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Culture of Murine Embryonic Metatarsals: A Physiological Model of Endochondral Ossification
07:23

Culture of Murine Embryonic Metatarsals: A Physiological Model of Endochondral Ossification

Published on: December 3, 2016

Articular cartilage development: a molecular perspective.

Facundo Las Heras1, Harpal K Gahunia, Kenneth P H Pritzker

  • 1University of Chile Clinical Hospital, University of Chile, 999 Santos Dumont Avenue, Santiago, Chile. facundo.lasheras@utoronto.ca

The Orthopedic Clinics of North America
|April 7, 2012
PubMed
Summary

This review details articular cartilage development and endochondral ossification, focusing on key molecular signaling pathways like TGF-β and Wnt, crucial for chondrogenesis and skeletal formation.

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Visualization of Chondrocyte Intercalation and Directional Proliferation via Zebrabow Clonal Cell Analysis in the Embryonic Meckel’s Cartilage

Published on: October 21, 2015

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Last Updated: May 23, 2026

Culture of Murine Embryonic Metatarsals: A Physiological Model of Endochondral Ossification
07:23

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Published on: December 3, 2016

Visualization of Chondrocyte Intercalation and Directional Proliferation via Zebrabow Clonal Cell Analysis in the Embryonic Meckel&#8217;s Cartilage
06:40

Visualization of Chondrocyte Intercalation and Directional Proliferation via Zebrabow Clonal Cell Analysis in the Embryonic Meckel’s Cartilage

Published on: October 21, 2015

Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Histology

Background:

  • Articular cartilage and endochondral ossification are complex developmental processes.
  • Understanding these processes is vital for regenerative medicine and treating skeletal disorders.

Purpose of the Study:

  • To review the morphologic and molecular aspects of articular cartilage development and endochondral ossification.
  • To highlight the roles of key signaling molecules and extracellular matrix components in chondrogenesis.

Main Methods:

  • Review of existing literature on cartilage development.
  • Analysis of molecular signaling pathways involved in chondrogenesis.
  • Examination of extracellular matrix components in developing cartilage.

Main Results:

  • Detailed description of histogenesis in articular cartilage.
  • Elucidation of the roles of transforming growth factor β (TGF-β), bone morphogenic proteins (BMPs), and Wnt-β catenin signaling in chondrogenesis.
  • Identification of critical extracellular matrix components essential for cartilage formation.

Conclusions:

  • Articular cartilage development is a highly conserved, dynamic, and robust biological process.
  • Proper signaling molecule activity and extracellular matrix composition are critical for successful chondrogenesis.
  • This review provides a comprehensive overview of the molecular mechanisms underlying cartilage development.