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Related Concept Videos

Bone Formation by Endochondral Ossification01:24

Bone Formation by Endochondral Ossification

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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...
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Growth of Cartilage and Bone Tissue01:27

Growth of Cartilage and Bone Tissue

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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...
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Development of the Limb Synovial Joints01:07

Development of the Limb Synovial Joints

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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...
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Changes in the Appendicular Skeleton with Age01:09

Changes in the Appendicular Skeleton with Age

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The upper and lower limb initially develops as a small bulge called a limb bud, which appears on the lateral side of the early embryo. The upper limb bud appears near the end of the fourth week of development, with the lower limb bud appearing shortly after.
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
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Hormones and Bone Tissue01:17

Hormones and Bone Tissue

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The endocrine system produces and secretes hormones, which interact with the skeletal system. These hormones control bone growth, maintain bone once it is formed, and remodel it.
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...
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Bone Formation by Intramembranous Ossification01:29

Bone Formation by Intramembranous Ossification

9.3K
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 ...
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Related Experiment Video

Updated: Nov 26, 2025

Culture of Murine Embryonic Metatarsals: A Physiological Model of Endochondral Ossification
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Enchondromatosis and Growth Plate Development.

Hongyuan Zhang1,2, Benjamin A Alman3,4

  • 1Department of Orthopaedic Surgery, Duke University School of Medicine, Durham, NC, 27710, USA.

Current Osteoporosis Reports
|December 11, 2020
PubMed
Summary

Enchondromas are benign cartilage tumors caused by disrupted chondrocyte differentiation. Recent research highlights key mutations, signaling pathways, and metabolic dysregulation involved in their development and potential progression to chondrosarcoma.

Keywords:
Bone developmentCartilage tumorsCell metabolismChondrosarcomaEnchondromaGrowth plate

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Culturing and Measuring Fetal and Newborn Murine Long Bones
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Area of Science:

  • Oncology
  • Cell Biology
  • Biochemistry

Background:

  • Enchondromas are common benign cartilage tumors originating from growth plate dysregulation.
  • Chondrocyte terminal differentiation is a critical process during skeletal development.

Purpose of the Study:

  • To review recent advancements in understanding enchondroma etiology.
  • To explore causative mutations, signaling, and metabolic pathways in enchondroma.
  • To examine the progression from enchondroma to chondrosarcoma.

Main Methods:

  • Literature review of recent studies on enchondroma.
  • Analysis of genetic mutations and molecular pathways.
  • Investigation of cellular differentiation mechanisms.

Main Results:

  • Somatic mutations in isocitrate dehydrogenase 1 and 2 (IDH1/2) are frequent in enchondromas.
  • Dysregulation of signaling pathways crucial for chondrocyte differentiation is observed.
  • Metabolic and epigenetic alterations contribute to enchondroma formation and progression.

Conclusions:

  • Enchondroma development involves complex molecular mechanisms.
  • Understanding these pathways is key to addressing enchondroma and chondrosarcoma.
  • Further research is needed to elucidate the full spectrum of enchondroma pathogenesis.