***The first group of tunjang rooted trees (dikotil) consisting of tree trunks is the main stem that grows upright tree canopy, ***
roots, and tunjang roots function to strengthen the establishment of trees. The tree trunk is the main part of the tree
, and it becomes the primary link with the root part as a water absorber, and the minerals, Branches are also stems, but smaller than the function of expanding the space for leaf growth to gain more sunlight and also suppress the surrounding competitors . The trunk is wrapped with a shell that protects the stem from damage, and the smaller branches are twigs, and leaves for photosynthesis.