Lamellae are thin, plate-like structures found in various biological contexts. In the context of bone tissue, lamellae refer to the concentric layers of mineralized matrix that form the structure of bones. These layers help provide strength and support, allowing bones to withstand various forces. In plants, lamellae can also refer to the thin layers within chloroplasts, where photosynthesis occurs. These layers contain chlorophyll and other pigments that capture sunlight, enabling plants to convert light energy into chemical energy. Both types of lamellae play crucial roles in their respective systems, contributing to the overall function and health of the organism.