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Spongy Bone

Spongy Bone

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...

Compact Bone

Compact Bone

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...

Bone Remodeling and Repair

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 as Supporting Connective Tissue

Bone as Supporting Connective Tissue

Bone tissue forms the internal skeleton of vertebrate animals, providing structure to the body.
Bone Matrix
Bone, or osseous tissue, is a connective tissue that has a large amount of two different types of matrix material. The organic matrix is similar to the matrix material found in other connective tissues, including some amount of collagen and elastic fibers. This gives strength and flexibility to the tissue. The inorganic matrix consists of mineral salts— mostly calcium salts— that give the...

Bone Structure

Bone Structure

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.

Bone Remodeling

Bone Remodeling

Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.

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Related Experiment Video

Updated: Jun 25, 2026

Multimodal Approach to Assess Bone Regeneration and Scaffold Performance

Multimodal Approach to Assess Bone Regeneration and Scaffold Performance

Published on: February 13, 2026

Modularity and robustness of bone networks.

Matheus Palhares Viana¹, Esther Tanck, Marcelo Emílio Beletti

¹Institute of Physics of São Carlos, University of São Paulo, São Carlos, Brazil.

Molecular Biosystems

|February 20, 2009

Summary

This summary is machine-generated.

Bone canal networks, essential for structural integrity, exhibit a modular organization. This complex network structure enhances bone robustness against failures, offering new avenues for studying diseases like osteoporosis.

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Distinctive Capillary Action by Micro-channels in Bone-like Templates can Enhance Recruitment of Cells for Restoration of Large Bony Defect

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Half-segmental Diaphyseal Bone Defect Model in Rats for Evaluating Bone Substitute Performance in Load-bearing Regions

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Area of Science:

Biophysics
Network Science
Bone Biology

Background:

Cortical bone structure features intricate canal networks crucial for mechanical support.
Understanding bone canal organization is key to comprehending bone mechanics and disease pathology.

Purpose of the Study:

To reconstruct and analyze the 3D network of canals within a chicken phalange.
To characterize the topological properties and robustness of the bone canal network.

Main Methods:

3D reconstruction using advanced image analysis and computer graphics.
Network theory applied to represent canals as edges and confluences as nodes.
Analysis of node degree distribution, community structure, and network resilience.

Main Results:

Bone canal networks follow a power law, indicating the presence of highly connected hubs.
The network is partitioned into distinct communities with unique topological properties.
Modular network structure enhances bone robustness against random and cascaded failures compared to regular networks.

Conclusions:

The study presents a novel network-based approach to analyze bone canal organization.
The modularity of bone networks contributes significantly to their resilience.
This framework enables investigation of disease effects (e.g., osteoporosis) and genetic mutations at a mesoscopic level.