Trabecular cartilage

Trabecular Cartilage

Diagram of human cartilage structure

Illustration of cartilage in sharks

Trabecular cartilage is a specialized form of cartilage that is characterized by a network of bony trabeculae, or small, beam-like structures, within the cartilage matrix. This type of cartilage is found in certain parts of the body where it provides structural support and flexibility.

Structure

Trabecular cartilage is composed of a dense network of collagen fibers and proteoglycans, which provide it with both strength and elasticity. The trabeculae within the cartilage are made up of mineralized tissue, which gives the cartilage its unique structural properties. This mineralization is similar to that found in bone, but trabecular cartilage remains more flexible than bone due to its cartilaginous matrix.

Function

The primary function of trabecular cartilage is to provide support and absorb mechanical stress in areas of the body that require both rigidity and flexibility. It is commonly found in the joints, where it helps to cushion and protect the ends of bones during movement. Additionally, trabecular cartilage plays a role in the growth and development of the skeletal system, particularly during the early stages of embryonic development.

Occurrence

Trabecular cartilage is found in various locations throughout the body, including the epiphyseal plates of growing bones, the meniscus of the knee, and the intervertebral discs of the spine. It is also present in certain cartilaginous fish, such as sharks, where it contributes to the flexibility and buoyancy of their skeletons.

Development

During development, trabecular cartilage forms through a process known as endochondral ossification, where cartilage is gradually replaced by bone. This process is crucial for the formation of long bones and the overall growth of the skeleton. The presence of trabecular cartilage in the growth plates of bones allows for the continued elongation of bones during childhood and adolescence.

Related Pages

• Cartilage
• Bone
• Endochondral ossification
• Meniscus (anatomy)
• Intervertebral disc

Trabecular cartilage

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  Trabecular cartilage illustration from Gray's Anatomy
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  Shark and Lacerta illustration from de Beer's 1937 work