Inside our tree looks like the frame of a building.
Some of our girls made 360 degree tree rings. It looked like a giant cookie. We can tell the life history of a tree by by examining its rings. Trees are an important part of our planet by providing shade, oxygen, decomposition for the soil and wood products. You can see the tree bark (skin), cambium (thick layer of cells), xylem (that brings water and food from the branches, twigs and leaves), heartwood (hardest wood and dead cells that give the tree strength) and pith (center of the tree) in this picture.