Leaves have many structures that prevent water loss, transport compounds, aid in gas exchange, and protect the plant as a whole.
Describe the internal structure and function of a leaf
The epidermis consists of the upper and lower epidermis; it aids in the regulation of gas exchange via stomata.
The epidermis is one layer thick, but may have more layers to prevent transpiration.
parenchyma (ground tissue) that comprises most of the interior of the leaf between the upper and lower layers of epidermis
a noncellular protective covering outside the epidermis of many invertebrates and plants
a hair- or scale-like extension of the epidermis of a plant
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