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Related Concept Videos

Structural Joints: Synovial Joints01:16

Structural Joints: Synovial Joints

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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...
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Tissue Membranes01:27

Tissue Membranes

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A tissue membrane is a thin layer of cells that covers the outside of the body, the organs, internal passageways that lead to the exterior of the body, and the lining of the moveable joint cavities. There are two basic types of tissue membranes— connective tissue and epithelial membranes.
Connective Tissue Membranes
The connective tissue membrane is formed solely from connective tissue. These membranes encapsulate organs, such as the kidneys, and line our movable joints. A synovial...
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Structural Classification of Joints01:20

Structural Classification of Joints

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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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Knee Joint01:23

Knee Joint

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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...
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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
An...
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Joints01:26

Joints

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Joints, also called articulations or articular surfaces, are points at which ligaments or other tissues connect adjacent bones. Joints permit movement and stability, and can be classified based on their structure or function.
Structural joint classifications are based on the material that makes up the joint as well as whether or not the joint contains a space between the bones. Joints are structurally classified as fibrous, cartilaginous, or synovial.
Fibrous Joints Are Immovable
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Related Experiment Video

Updated: Apr 20, 2026

Author Spotlight: Isolation and Culture of Primary Synovial Macrophages and Fibroblasts from Murine Arthritis Tissue
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Author Spotlight: Isolation and Culture of Primary Synovial Macrophages and Fibroblasts from Murine Arthritis Tissue

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Synovial membrane asks for independence.

S Moskalewski, A Osiecka-Iwan1, E Jankowska-Steifer

  • 1Department of Histology and Embryology, Warsaw Medical University, Warsaw, Poland. aosiecka@ib.amwaw.edu.pl.

Folia Morphologica
|December 3, 2014
PubMed
Summary
This summary is machine-generated.

The synovial membrane, traditionally viewed as joint capsule lining, exhibits distinct developmental, structural, and functional characteristics. Evidence suggests it should be recognized as an independent organ rather than a mere component of the joint capsule.

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Area of Science:

  • Anatomy
  • Histology
  • Pathology

Background:

  • The synovial membrane is conventionally described as integral to the joint capsule.
  • This traditional view overlooks its unique biological attributes.

Purpose of the Study:

  • To re-evaluate the classification of the synovial membrane.
  • To determine if the synovial membrane warrants recognition as a distinct organ.

Main Methods:

  • Comparative analysis of synovial membrane and fibrous capsule.
  • Examination of developmental, structural, functional, vascular, and neural aspects.
  • Assessment of pathological involvement.

Main Results:

  • The synovial membrane displays significant differences from the fibrous capsule in development, structure, function, vascularization, and innervation.
  • In certain regions, the synovial membrane lacks direct contact with the fibrous capsule.
  • Pathological processes uniquely involve the synovial membrane.

Conclusions:

  • The synovial membrane possesses unique characteristics differentiating it from the joint capsule.
  • Based on its distinct biological profile, the synovial membrane should be classified as an independent organ.