The main body of a tree is called the trunk. The trunk serves several vital functions: it provides structural support, allowing the tree to grow tall and reach sunlight; it transports water, nutrients, and sugars between the roots and the leaves; and it acts as a storage area for carbohydrates. The trunk is covered by bark, which protects it from pests and diseases. The growth rings within the trunk can also provide valuable information about the tree’s age and the environmental conditions it has endured throughout its life.