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Related Concept Videos

Compact Bone01:27

Compact Bone

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Most bones contain compact and spongy osseous tissue, but their distribution and concentration vary based on the bone's overall function.
Compact bone, also called cortical bone, is the denser, stronger of the two types of bone tissue. It is found under the periosteum and in the diaphyses of long bones, where it provides support and protection. The microscopic structural unit of compact bone is called an osteon, or haversian system. Each osteon is composed of concentric rings of calcified...
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Spongy Bone01:09

Spongy Bone

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All bones comprise an outer layer of compact bone, and an interior made up of spongy bone tissue, also called cancellous or trabecular bone. In long bones, spongy bone tissue is mainly found in the interior of the epiphyses (broad ends of the bone).
Spongy bone is more porous, and less dense compared to compact bone. It is composed of concentric lamellae that are arranged irregularly to form the trabecular network. In some bones, the spaces between trabeculae contain red marrow, where...
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Bone Disorders01:29

Bone Disorders

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Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
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Gross Anatomy of Bone01:17

Gross Anatomy of Bone

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The two main features of a long bone are the diaphysis and the epiphysis.
The diaphysis is the tubular shaft that runs between the proximal and distal ends of the bone. The walls of the diaphysis are composed of dense and hard compact bone made of numerous osteons — the functional unit of the compact bone. The hollow region in the diaphysis is called the medullary cavity, which harbors the bone marrow. In infants and children, this marrow cavity is filled with red marrow, whereas in...
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Bone Structure01:55

Bone Structure

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Within the skeletal system, the structure of a bone, or osseous tissue, can be exemplified in a long bone, like the femur, where there are two types of osseous tissue: cortical and cancellous.
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Classification of Bones01:18

Classification of Bones

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The bones of the human skeletal system are of varied shapes, sizes, and functions. They can be classified based on their shape and function into four major classes: long bones, short bones, flat bones, and irregular bones. Some classifications include a fifth type, the sesamoid bones, as a separate class, whereas others categorize them under short bones.
Long and Short Bones
The appendicular skeleton, particularly the upper and lower limbs, is primarily made of long and short bones. The...
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Related Experiment Video

Updated: Nov 30, 2025

Author Spotlight: An Economic and Efficient Method for Quantitative Evaluation of Bone Microarchitecture in a Murine Osteoporosis Model
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Author Spotlight: An Economic and Efficient Method for Quantitative Evaluation of Bone Microarchitecture in a Murine Osteoporosis Model

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Ethnic Differences in Bone Microarchitecture.

Ruth Durdin1,2, Camille M Parsons1, Elaine Dennison1,2

  • 1MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton General Hospital, Southampton, SO16 6YD, UK.

Current Osteoporosis Reports
|November 17, 2020
PubMed
Summary
This summary is machine-generated.

This review explores global fracture epidemiology and ethnic variations in bone health. Advanced imaging reveals differences in bone density and structure, impacting fracture risk across diverse populations.

Keywords:
AdultDual-energy X-ray absorptiometryEthnicityMicroarchitectureQuantitative computed tomography

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Area of Science:

  • Orthopedics and Bone Health
  • Epidemiology and Public Health
  • Medical Imaging and Diagnostics

Background:

  • Fracture incidence varies globally and between ethnic groups.
  • Understanding these differences is crucial for targeted prevention strategies.
  • Existing research highlights the need for further investigation into underlying causes.

Purpose of the Study:

  • To provide an overview of current global fracture epidemiology.
  • To examine recent findings on ethnic disparities in bone density, geometry, and microarchitecture.
  • To explore the relationship between these bone characteristics and fracture risk.

Main Methods:

  • Focus on studies utilizing peripheral quantitative computed tomography (pQCT).
  • Review of recent epidemiological and imaging research.
  • Analysis of data on bone density, geometry, and microarchitecture.

Main Results:

  • Recent studies confirm variations in fracture incidence across countries and ethnic groups.
  • Advanced imaging techniques, like pQCT, are enhancing understanding of ethnic differences in bone characteristics.
  • These differences in bone structure are potential contributors to observed fracture risk variations.

Conclusions:

  • Continued research is essential to fully understand fracture epidemiology and its changing patterns.
  • Further investigation into the phenotypic and biological underpinnings of ethnic differences in fracture risk is a priority.
  • Advanced imaging plays a key role in elucidating these complex relationships.