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Root cap epidermis's function is protection while that of root hair is absorption .
"As you recall, epidermis (1) is the outermost cell layer of leaves, roots and stems. Unlike the root epidermis, stem and leaf epidermis contain stomata (more on stomata when we discuss photosynthesis). In many plants, leaf and stem epidermis is covered by a wax-like layer of cutin, which protects the plants from excessive water loss, and from pathogen attack."
The special structural character that the root epidermis possess is the root hairs which enables it perform its functions effectively.
Epidermis in roots: The epidermis in the roots of a plant is the outside layer of a root. It's function is to protect the root.Epidermis in leaves: There is an upper and lower epidermis in the leaves.
root
The epidermis of a carrot is the outer part of the root. This part is usually what people peel off.
Root Hairs
The outermost layer of a root is called the epidermis. It is a single layer of cells that protects and covers the root. In stems and leaves, the outermost layer is also called the epidermis, and it serves a similar protective function.
Epidermis is on the outside of root just beneath the palisade layer of the leaves. The epidermis is common in roots and will be used to absorb nutrients.
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is epidrmis present in root hairs
Stomata