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The different morphology, size and distribution of components in four articular cartilage zones
| Name | Superficial Zone |
Middle Zone | Deep Zone | Calcified Zone |
|
|---|---|---|---|---|---|
| Chondrocytes | morphology | flattened | rounded | rounded or ellipsoid284 | small and inert |
| Collagen fibrils | % dry weight7 | 86% | between | 67% | ND |
| diameter7,285,286 | 30–35 nm | between | 40–80 nm | ND | |
| Proteoglycan | % dry weight29 | 15% | 25% | 20% | ND |
| Water | % wet weight284 | 84% | between | 40–60% | ND |
| Total thickness | % total tissue21 | 10–20% | 40–60% | 20–30% | ND |
