Ligaments vs. Cartilage: Structure, Function, and Healing Differences
| Feature | Ligaments | Cartilage |
|---|---|---|
| Composition | Dense regular connective tissue; mostly type I collagen fibers. | Specialized connective tissue: chondrocytes in matrix of type II collagen + proteoglycans (aggrecan). |
| Location | Bone-to-bone (joint capsules, e.g., ACL, MCL). | Articular surfaces (hyaline); fibrocartilage (menisci, discs); elastic cartilage (ear, epiglottis). |
| Function | Stabilize joints; limit excessive motion. | Shock absorption, smooth gliding, structural support. |
| Vascularity | Poor (outer 1/3 only). | Avascular (nutrients by diffusion). |
| Healing Capacity | Slow, scar formation; often incomplete. | Very limited; hyaline cartilage defects fill with fibrocartilage. |
Both are essential for musculoskeletal integrity but differ fundamentally in structure, metabolism, and repair.
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