Trees and the Products We Get from Them
Trees and the Products We Get from Them
Scott Leavengood Oregon State University Extension Service Wood Products Extension Agent
Trees:
? What is a tree? ? How do trees "eat"? ? What do the different parts of trees do? ? What are the different kinds of trees? ? What do we make from trees?
Tree: A Tower Loaded With Solar Panels
Tree- definition
? At least 15 feet tall ? Persistent woody stem ? Exhibit secondary thickening (grow in
diameter as well as height)
?
All living things must eat to survive
Herbivores
Carnivores
How do trees and other plants eat?
Plants "Manufacture" Their Own Food
CO2
Photosynthesis
energy
The sun provides energy used to combine carbon dioxide gas (from the air) with water (from the soil).
CO2 + H2O = glucose (sugar) + O2
glucose- support life and new growth
H2O
What do the different parts of trees do?
Bark
Wood
Leaves
Roots
What do the different parts of trees do?
Bark
Wood
Wood provides mechanical support for the tree and is the "plumbing", moving water from the roots to the leaves.
Leaves
Leaves are the trees "food factory." Carbon dioxide (CO2) is brought in through small holes called stomata. Water is brought up through the xylem (wood). CO2 and water are combined via photosynthesis to produce glucose (a sugar) and oxygen (O2).
Roots
Bark
What do the different parts of trees do?
Wood
Roots support the tree and draw in water and nutrients from the soil.
The outer layer of the bark protects the tree from damage due to mechnical damage, fire, freezing, insects, and fungi. The inner bark (phloem) conducts the sugars produced by the leaves down to the rest of the tree.
Leaves Roots
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