Let's find out how a tree is built. The tallest trees in the world are coast redwoods. That is true as of November 2026.
Roots take in water and food from soil for trees. Coast redwoods also take in water from fog. This is true as of November 2026.
Sapwood is the tree's pipeline. It carries water up to the leaves. Heartwood is the central pillar of the tree.
The cambium is a cell layer in the trunk. It is the growing part of the trunk.
A trunk cut across shows rings. The number of rings shows how old a tree is. It can also show how old a limb is.
Bark keeps insects away. Bark keeps trees warm in cold and cool in heat.
Bark is a tree's protection from the outside world. Coast redwood bark is thick. It protects the tree from fire.
Leaves make food for the tree. They get their green color from chlorophyll. Chlorophyll is a pigment.
Evergreen trees stay green all year. A pine tree is an evergreen. Pine trees carry their seeds in cones.
A maple seed has a wing. Squirrels hide acorns by burying them. That moves oak seeds around.
Words to know
- sapwood: water pipeline
- heartwood: central pillar
- cambium: growing layer
- chlorophyll: green pigment
- evergreen: green all year
