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Related Concept Videos

Functional Classification of Joints01:09

Functional Classification of Joints

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Functional Classification of Joints
The functional classification of joints is determined by the amount of mobility between the adjacent bones. Joints are functionally classified as a synarthrosis or immobile joint, an amphiarthrosis or slightly moveable joint, or as a diarthrosis, a freely moveable joint. Fibrous and cartilaginous joints can be functionally classified as either synarthroses  or amphiarthroses, whereas all synovial joints are classified as diarthroses.
Synarthrosis
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Structural Classification of Joints01:20

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Joints, also known as articulations, are classified based on their structural characteristics, i.e., based on whether the articulating surfaces of the adjacent bones are directly connected by fibrous connective tissue or cartilage, or whether the articulating surfaces contact each other within a fluid-filled joint cavity. These differences serve to divide the joints of the body into three structural classifications.
A fibrous joint is where the adjacent bones are united by fibrous connective...
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The Functions of the Skeletal System01:22

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The most apparent functions of the skeletal system are support, protection, and movement. However, bone tissue also performs several other critical metabolic functions. For one, the bone matrix acts as a reservoir for a number of minerals important to the functioning of the body, especially calcium and phosphorus. These minerals, present in the bone tissue, can be released back into the bloodstream when required. Calcium ions, for example, are essential for muscle contractions and controlling...
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Introduction to Joints00:58

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The adult human body usually has 206 bones, and except for the hyoid bone in the neck, each bone is connected to at least one other bone. Joints are the location where bones come together. Many joints allow for movement between the bones. At these joints, the articulating surfaces of the adjacent bones can move smoothly against each other. However, the bones of other joints may be joined by connective tissue or cartilage. These joints are designed for stability and provide little or no...
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Microscopic Anatomy of Skeletal Muscles01:13

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Skeletal muscle cells, also called muscle fibers, are distinctly elongated, multi-nucleated, slender biological units. They are packed with specialized structures designed to facilitate their primary function, which is contraction.
The muscle sarcolemma is a plasma membrane enclosing each muscle cell that conducts electrical signals called action potentials. The sarcolemma extends into the cell to form T-tubules, ensuring the neural impulses are uniformly distributed across the entire muscle...
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Structural Organization of the Human Body: An Overview01:18

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It is convenient to consider the body's structures in terms of fundamental levels of organization that increase in complexity: subatomic particles, atoms, molecules, organelles, cells, tissues, organs, organ systems, and organisms.
To study the chemical level of organization, scientists consider the simplest building blocks of matter: subatomic particles, atoms, and molecules. All matter in the universe is composed of one or more unique pure substances called elements, familiar examples of...
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Related Experiment Video

Updated: Aug 30, 2025

Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion
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Modularity of the Human Musculoskeletal System: The Correlation between Functional Structures by Computer Tools

Daniele Della Posta1, Jacopo Junio Valerio Branca1, Giulia Guarnieri1

  • 1Department of Experimental and Clinical Medicine, Anatomy and Histology Section, University of Firenze, L.go Brambilla 3, 50134 Firenze, Italy.

Life (Basel, Switzerland)
|August 26, 2022
PubMed
Summary

This study maps the human musculoskeletal system as a network of 2298 body parts and 7294 connections. This detailed anatomical network reveals the topological organization and functional behavior of osteo-myofascial structures.

Keywords:
algorithmsanatomical structurebiological modelshuman bodylocomotor apparatusmodularitymusculoskeletal system

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Area of Science:

  • Anatomy
  • Network Science
  • Biomechanics

Background:

  • Traditional anatomical studies offer fragmented views of the body.
  • Understanding structural and functional integration requires reconstructing complex anatomical networks.
  • Systemic study of human body apparatuses is essential.

Purpose of the Study:

  • To investigate the connections within the whole-body osteo-myofascial structures.
  • To analyze the human musculoskeletal system using network analysis.
  • To create a comprehensive anatomical network map.

Main Methods:

  • Utilized the aNETomy® anatomical network.
  • Implemented open-source Cytoscape software for data entry.
  • Applied network analysis to osteo-myofascial structures.

Main Results:

  • Constructed a musculoskeletal network with 2298 nodes (body parts) and 7294 links.
  • Observed distinct distributions in weighted and unweighted osteo-myofascial networks.
  • Identified topological organization and functional behavior within the network structure.

Conclusions:

  • Developed a detailed anatomical network map of the entire musculoskeletal system.
  • The network serves as a tool for understanding complex morphological organization.
  • This map is particularly relevant for studying rehabilitation of movement dysfunctions.