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Structural Joints: Synovial Joints

Structural Joints: Synovial Joints

Synovial joints are the most common type of joint in the body. A key structural characteristic for a synovial joint is the presence of a joint cavity. This fluid-filled space is where the articulating surfaces of the bones contact each other. Also, unlike fibrous or cartilaginous joints, the articulating bone surfaces at a synovial joint are not directly connected to each other with fibrous connective tissue or cartilage. This gives the bones of a synovial joint the ability to move smoothly...

Development of the Limb Synovial Joints

Development of the Limb Synovial Joints

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...

Structural Joints: Cartilaginous Joints

Structural Joints: Cartilaginous Joints

As the name indicates, at a cartilaginous joint, the adjacent bones are united by cartilage, a tough but flexible type of connective tissue. Unlike synovial joints, these types of joints lack a joint cavity and involve bones joined together by either hyaline cartilage or fibrocartilage.
There are two types of cartilaginous joints:
Synchondrosis
A synchondrosis ("joined by cartilage") is a cartilaginous joint where bones are connected by hyaline cartilage. Synchondrosis may be temporary or...

Knee Joint

Knee Joint

The knee joint is the most complicated joint in the body. It consists of three articulations– two tibiofemoral and one patellofemoral. As is characteristic of synovial joints, the knee joint has a thin articular capsule that partially surrounds this joint cavity. Additionally, several ligaments, muscles, and cartilaginous structures support the movement of the knee.
A total of seven ligaments support the knee joint. The patellar ligament, which is also attached to the quadriceps femoris group...

Glycosaminoglycans

Glycosaminoglycans

Glycosaminoglycans (GAGs), also known as mucopolysaccharides, are long and linear polymers comprising of specific repeating disaccharides - the amino sugar that can be N-acetylglucosamine or N-acetylgalactosamine, and a uronic acid that is usually glucuronic acid or iduronic acid.
GAGS are found in the extracellular matrix of vertebrates, invertebrates, and bacteria. Due to their polar nature they attract water, and serve as excellent lubricants or shock absorbers in an animal body.
Hyaluronic...

Bone Disorders

Bone Disorders

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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Related Experiment Video

Updated: Jun 23, 2026

A 3D System for Culturing Human Articular Chondrocytes in Synovial Fluid

A 3D System for Culturing Human Articular Chondrocytes in Synovial Fluid

Published on: January 31, 2012

[Synovial chondromatosis].

M Fuerst¹, J Zustin, C Lohmann

¹Lehrstuhl für Orthopädie, Klinikum Bad Bramstedt, Universitätsklinikum Hamburg-Eppendorf, Martinistrasse 52, 20246, Hamburg, Deutschland. mfuerst@uke.uni-hamburg.de

|May 22, 2009

Summary

This summary is machine-generated.

Primary articular synovial chondromatosis is a benign condition where cartilage nodules form in joint tissue, most often affecting the knee. Treatment varies based on disease stage, involving surgical removal of nodules and affected tissue.

Related Experiment Videos

Last Updated: Jun 23, 2026

A 3D System for Culturing Human Articular Chondrocytes in Synovial Fluid

A 3D System for Culturing Human Articular Chondrocytes in Synovial Fluid

Published on: January 31, 2012

Area of Science:

Orthopedics
Pathology

Context:

Primary articular synovial chondromatosis is a rare, benign neoplastic process.
Characterized by the formation of hyaline cartilage nodules within synovial tissue.

Purpose:

To describe the pathogenesis, clinical presentation, and therapeutic management of primary articular synovial chondromatosis.
To highlight the metaplastic maturation of mesenchymal cells into chondrocytes within the joint synovium.

Summary:

Mesenchymal cells in the synovial membrane differentiate into chondroblasts, forming cartilage nodules.
These nodules enlarge, detach into the joint space as loose bodies, and can calcify or ossify.
Surgical intervention, including synovectomy and removal of loose bodies, is tailored to the disease stage.

Impact:

Understanding the disease progression aids in appropriate surgical planning.
Distinguishing benign disease from rare malignant transformation is crucial for patient outcomes.
This condition primarily affects the knee and elbow joints, particularly in men.