botany rev 1 - PT 3 (parts of a tree) Flashcards
o Consists of the leaves and the branches at the top
of a tree.
Crown
o Function/s: food factories of the tree and photosynthesis
Leaves
contain chlorophyll which gives leaves their green
color for photosynthesis.
Leaves
o Function/s: supports the leaves and the branches of the tree
o Contains the xylem, the cambium, the phloem, and the heartwood.
Trunk (Stem):
o Inner core of dead wood, but it does not decay as its cellulose fibers are held together by a chemical glue called lignin
Heartwood
o The youngest layer of wood
o Function/s: transports water and minerals up the tree to the branches and the leaves.
Sapwood (Xylem):
o Function/s: supports the tree.
o As a tree grows, older xylem cells in the center of the tree become inactive and die, forming the _____.
heartwood
As new layers are added, old sapwood rings lose their vitality and turn to heartwood
TRUE OR FALSE
TRUE
:
o The growing thin layer
o Function/s: annually produces new layers of bark.
(Phloem on one side and xylem on the other)
Cambium
(Phloem):
o Function/s: carries nutrients and sugar from leaves
down the tree to its branches, trunk, and roots.
Inner Bark
o Function/s: protects the tree from injury, disease,
insects, and weather.
Outer Bark:
*: absorbs water and minerals from the soil
Roots
:
o Long main root o Function/s:
* Anchors the tree and absorbs water and nutrients from deep in the soil.
* Support the tree.
Taproot
o Underground roots that get smaller and smaller.
o Function/s: take in water and nutrients and help to
support the tree.
Lateral Roots:
o Function/s: records the tree’s age.
o Every year a tree grows a little more and a new tree
ring is made.
Annual Tree Rings
