1. epidermis; cuticleAnatomy, Zoology
2. bark; epidermisBotany
3. facadeArchitecture
Wikipedia definition
4. Epidermis (botany)1. Pith, 2. Protoxylem, 3. Xylem I, 4. Phloem I, 5. Sclerenchyma, 6. Cortex, 7. Epidermis]] The epidermis is a single-layered group of cells that covers plants' leaves, flowers, roots and stems. It forms a boundary between the plant and the external environment. The epidermis serves several functions, it protects against water loss, regulates gas exchange, secretes metabolic compounds, and (especially in roots) absorbs water and mineral nutrients.
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