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Anatomy of a Tree

Learn the names of each part of a tree.
a data set by NatureLover
created May 3, 2017
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FAMILY TREE
TermDefinitionImage
Outer BarkProtective layer that keeps moisture in when it's dry and out when it's wet. It protects against cold, heat and insects.
Phloem (Inner Bark)Passes food to the rest of the tree. After a short time it dies and becomes part of the outer bark.
Cambium Cell LayerThis layer produces new bark and wood annually.
Xylem (Sapwood)Pipeline for water to move up to the leaves.
HeartwoodSupportive pillar in the center of the tree. Although technically dead, as long as the other layers are intact it will not decay.
CrownThe head of foliage on a tree.
BranchWoody part of the tree that grows out of the trunk.
TrunkThe woody pillar of the tree that supports the crown.
RootsTypically found in the top three feet of earth, they may occupy a space two to four times the size of the crown. This system absorbs water and minerals, anchors the tree, and stores food reserves for the winter.
LeavesCarries out photosynthesis which makes food for the tree and releases oxygen into the air.
NeedleThe leaf of a coniferous tree.
LobeThe projections that create the shape of a leaf.
SinusIndents between the lobes of a leaf.
MarginThe edge of a leaf.
MidribThe central vein of a leaf.
PetioleThe stalk that connects a leaf to a twig.
FlowerSeed-bearing part of the tree. Reproductive organs surrounded by petals.
FruitThe fleshy (and usually sweet tasting) product of a tree which contains the seeds.
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