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Related Concept Videos

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.
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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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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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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.
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Agouti: A Lethal Allele
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Related Experiment Video

Updated: Mar 18, 2026

Culturing and Measuring Fetal and Newborn Murine Long Bones
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Achondroplasia.

Doreen Crawford1, Annette Dearmun2

  • 1De Montfort University, Leicester.

Nursing Children and Young People
|July 9, 2016
PubMed
Summary

Achondroplasia is a genetic disorder causing disproportionate short stature, with affected adults typically reaching about 4 feet. This condition is identified by a distinct set of characteristic anomalies.

Area of Science:

  • Genetics
  • Endocrinology
  • Pediatrics

Background:

  • Achondroplasia is the most common form of disproportionate dwarfism.
  • It is characterized by specific skeletal abnormalities and significantly impaired linear growth.

Purpose of the Study:

  • To provide a concise overview of achondroplasia.
  • To highlight its key features and impact on adult height.

Main Methods:

  • Syndromic recognition based on typical anomalies.
  • Clinical assessment of growth parameters.

Main Results:

  • Achondroplasia is a syndrome with a recognizable pattern of anomalies.
  • Average adult height in individuals with achondroplasia is approximately 4 feet.

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Laser Capture Microdissection of Mouse Embryonic Cartilage and Bone for Gene Expression Analysis
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Related Experiment Videos

Last Updated: Mar 18, 2026

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06:58

Culturing and Measuring Fetal and Newborn Murine Long Bones

Published on: April 26, 2019

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

  • Achondroplasia is a significant cause of short stature.
  • Early recognition and understanding of its features are crucial for management.