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15 Cards in this Set
- Front
- Back
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Xylem (Sap Wood) |
Water conducting tissues -Typically only moves water upwards |
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Phloem (Inner bark) |
Food conducting Tissues (Sugars) -Moves food where its needed within the tree |
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Vessel Elements |
Angiosperms typically have vessel elements - Water moves up vessels faster then tracheids do to larger openings |
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Tracheids Elements: |
Gymnosperms typically have tracheids elements |
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Spring Wood V.S Summer Wood |
Spring wood typically has larger pores do to an abundance of water where as summer wood has smaller pores do to a lack of water |
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Two general types of vessel elements arrangements in angiosperms |
-Ring porous Wood -Diffuse porous Wood |
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Ring porous Wood |
Ring porous wood have larger vessel elements in the spring and smaller elements in the summer do to available water resources |
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Diffuse porous wood |
Diffuse porous wood have uniform vessel elements year round regardless of water available |
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Heart Wood |
developed over time made up of Old xylem/ sapwood, used for storage and strength, no longer conducts or moves water up the tree |
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Sap wood |
Light outer most layer moving water and minerals up the tree |
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Pith |
The centre of the tree and first year of growth |
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Cambium |
Layer one cell thick inside the inner bark producing xylem and phloem, this is where growth interns of girth occurs |
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Phloem or inner bark |
This layer carries food (Sugars produced in photosynthesis to there desired place in the tree |
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Outer Bark |
This layer is the trees defence against: insects, decease, excessive heat or cold and other injuries |
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Growth ring: |
Lighter portion of ring is early wood, growth from the spring where the dark wood is late wood from the summers growth. -Together they make up a years worth o growth |
