Composition and Structure of Articular Cartilage A Template Biology Diagrams The articular cartilage is a type of specialized connective tissue present in synovial joints. It is composed of hyaline cartilage with a dense extracellular matrix and scattered specialized cells of the cartilage known as chondrocytes.. The extracellular matrix is mainly composed of collagen, proteoglycans, and glycoproteins which help to retain the water molecules in the matrix. Maintaining healthy articular cartilage through proper nutrition, exercise, and avoiding excessive stress on the joints is key to preserving joint health in the long term. Prioritizing care for this vital tissue can significantly impact overall mobility and quality of life. Common Issues and Diseases Affecting Articular Cartilage Following an intra-articular fracture, in addition to mechanical disruption and cartilage necrosis, the following inflammatory cytokines are released, contributing to articular damage and the eventual development of post-traumatic arthritis:IL-1ฮฒ, TNF-ฮฑ, nitric oxide, matrix metalloproteinases, aggrecans, and damage associated molecular patterns.
An understanding of articular cartilage anatomy and physiology will enable the physician to more fully appreciate its function and necessity. Articular cartilage is made up of four basic biological layers or zones. Each zone possesses attributes necessary to make articular cartilage as a whole strong, durable, and more able to withstand shear Articular cartilage (histological slide) Additionally, a glycoprotein known as lubricin that is abundant in the superficial layer of cartilage and synovial fluid plays a major role in bio-lubrication and wear protection of cartilage.. Layers. The layers of articular cartilage are defined by zones. Starting from the subchondral bone, there is a tidemark that is deep to the basal layer and Articular cartilage is the highly specialized connective tissue of diarthrodial joints. Its principal function is to provide a smooth, lubricated surface for articulation and to facilitate the transmission of loads with a low frictional coefficient ().Articular cartilage is devoid of blood vessels, lymphatics, and nerves and is subject to a harsh biomechanical environment.
Cartilage: Anatomy, histology, types and functions Biology Diagrams
Articular (hyaline) cartilage anatomy. Hyaline articular cartilage is an aneural, avascular, and alymphatic structure. Chondrocytes form only 1-5% of the volume of articular cartilage. Chondrocytes receive their nutrition by diffusion through the matrix.
Since articular cartilage lacks its own blood supply, it relies on the diffusion of nutrients and oxygen from the synovial fluid to sustain cellular functions. This nutrient exchange is facilitated by regular joint movement, which promotes fluid circulation and ensures the delivery of essential molecules to the cartilage.
Articular Cartilage: Anatomy, Injury, and Repair Biology Diagrams
A further function of articular cartilage is the ability for that part of the anatomy to move on one or more planes. The joint range of movement depends on the specific type of diarthroidal joint. Where Is Articular Cartilage Found. Articular cartilage locations are found throughout the body.
