Common Trees of Pennsylvania |
DIAGRAM SHOWING FUNCTIONS OF DIFFERENT PARTS OF A TREE
Courtesy of the New Tree Experts Manual by Richard R. Fenska - MEDULLARY RAYS
- CONDUCT FOOD AND WATER RADIALLY, SERVE IN FOOD STORAGE
- PITH
- ANNUAL RINGS
- INDICATE GROWTH, NORMALLY ONE RING PER YEAR
- LEAVES
- THE AIR SUPPLIES CARBON, THE PRINCIPAL FOOD OF THE TREE, WHICH IS TAKEN IN ON THE UNDER SURFACE OF THE LEAVES.
- HEARTWOOD (INACTIVE CELLS)
- ADDS STRUCTURAL SUPPORT
- SAPWOOD
- CARRIES FOOD AND WATER UPWARD
- CAMBIUM
- GROWING LAYER, CELLS DIVIDE HERE TO FORM BOTH BARK AND WOOD.
- INNER BARK
- CARRIES FOOD MADE IN THE LEAVES DOWNWARD TO CAMBIUM AND STORAGE CELLS.
- OUTER BARK
- INACTIVE CELLS FORM PROTECTION FOR INNER BARK
- SOIL
- BACTERIA AND FUNGI MAKE AVAILABLE SOIL NUTRIENTS
- ROOTS
- ABSORB FOOD ELEMENTS THROUGH THE TINY ROOT HAIRS, ALSO PROVIDE ANCHORAGE
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