Trees - Parts of tree trunk
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7 Terms
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Bark
Outer protective skin of tree. Protects wood from insects and fungi.
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Bast (phloem)
Bring food(sap) down from leaves to tree.
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Cambium layer
Xylem carry water + minerals up from root to leaves.
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Sapwood
Cells carry water + nutrients up and down trunk. Lighter, softer less durable part of tree.
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Heartwood
Gives support and is very durable and resistant to fungal attack.
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Ray cells
Move sap between the centre and outside of trunk.
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Annual rings
Allows us to estimate age of the tree.
Note 
Flashcards (27)