A tree is a tall plant with a trunk and branches made of wood. Trees can live for many years. The oldest tree ever discovered is approximately 5,000 years old and the oldest tree from the UK is about 1,000. The four main parts of a tree are the roots, the trunk, the branches, and the leavesThe parts of a tree are the roots, trunks, branches, twigs and leaves. Tree stems are mainly made of support and transport tissues xylem and phloem. Wood consists of xylem cells, and bark is made of phloem and other tissues external to the vascular cambium.
圖片編號:
214520890
拍攝者:
Moazmasaeed1982
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標準授權 | 360 x 480 px | JPG | 13 點 |
標準授權 | 600 x 800 px | JPG | 15 點 |
標準授權 | 1500 x 2000 px | JPG | 18 點 |
標準授權 | 1936 x 2581 px | JPG | 20 點 |
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進階授權 | 3000 x 4000 px | JPG | 88 點 |
進階授權 | 3000 x 4000 px | JPG | 88 點 |
進階授權 | 3000 x 4000 px | JPG | 88 點 |