![]() Trees are renewable resources because, if cut down, other trees can grow in their place. They need oxygen as well as carbon dioxide to live. Plants also do some respiration using oxygen the way animals do. This is the opposite of what animals do in respiration. Trees and shrubs take in water and carbon dioxide and give out oxygen with sunlight to form sugars. The leaves take in sunlight and use water and food from the roots to make the tree grow, and to reproduce. ![]() The leaves of a tree are green most of the time, but they can come in many colors, shapes and sizes. They spread out so that the leaves can get more sunlight. The trunk is covered with bark which protects it from damage. Sometimes, roots are specialized into aerial roots, which can also provide support, as is the case with the banyan tree. ![]() The roots carry nutrients and water from the ground through the trunk and branches to the leaves of the tree. The roots of the mangrove tree are often under water. ![]() The roots of a tree are usually under the ground. The four main parts of a tree are the roots, the trunk, the branches, and the leaves. The oldest tree ever discovered is approximately 5,000 years old and the oldest tree from the UK is about 1,000. and this shows how the strangler fig growsĪ tree is a tall plant with a trunk and branches made of wood.
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