| A | B |
|---|
| Outer Bark | Protects the tree from insects and injury. |
| Inner Bark | Water tight and contains the sap. |
| Cabmium Layer | This is where the actual growth of the tree takes place. |
| Sapwood | Consists of living cells which feed sap from the roots to the trunk. |
| Heartwood | The cells of this wood are clogged with resins and gums and do not function. |
| Coniferous Tree | Includes Spruce, Pine, and Fir trees. |
| Deciduous Tree | Includes Oak, Maple, and Birch trees. |
| Pith | In young trees, it contains food essential for their growth. |
| Medullary Rays | A series of cells which radiate from the center of the tree towards the outside of the stem. |
| Annual Rings | Has two sections, springwood and summerwood. Each complete unit represents one years growth. |
