what are the different parts of stem ?
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Stem usually consist of three tissues, dermal tissue, ground tissue and vascular tissue. The dermal tissue covers the outer surface of the stem and usually functions to waterproof, protect and control gas exchange. The ground tissue usually consists mainly of parenchyma cells and fills in around the vascular tissue.
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They are also made up of nodes, which are the places on a stem where leaves and buds are found (the exits or intersections) and internodes, the areas in between nodes. From the outside to inside, the layers of stems are: bark or epidermis, phloem, cambium, xylem and, finally, pith.
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