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tree
Large vegetable whose root system and aboveground part are well developed; it produces oxygen and provides wood.
structure of a tree
The tree is composed of an underground part, the roots, and two aboveground parts, the trunk and the crown.
cross section of a trunk
Moving from the center to the periphery there are six parts: the pith, the heartwood, the sapwood, the cambium, the phloem and the bark.
