Structure of Woody Plants
Layers
Pholem
Pith
Xylem
Epidermis or Bark
Cortex
Outer layers of stem for production
Transport tube for moving sugars
Distribute foods
To store and transport nutrients
Cambium
Helps in high cell growth
Transport tube for water and minerals from the root
Transport materials into the central cylinder of the root
Through diffusion and stores food in the the form of starch
Functions
Definition of woods
Heart wood
Sap wood
Produces by the vascular cambium
It is actually layers of secondary xylem
Near the center of the stem
Contains old xylem that no longer conducts liquids
Actives in fluid transport
surrounds heartwood
To transport water and dissolved minerals salts from the roots to rest of the plants
Allowing photosynthesis to occur
To transport food made by the leaves to the rest of the plants
Transport substances throughout the plant
Holds leaves up to the sun
produce organs like the branches,leaves and flowers.
Growth
Contains
Tissue Elements
Primary Growth
Secondary growth
Takes in all seeds plants
Results of elongation of cells
Produced in the meristem
Epidermis
Cortex
Pith
primary Phloem
Vascular Cambium
Primary xylem
rare in monocot
An increases in the thickness of stems and roots
common among dicots and gynosperm
Primary xylem
In conifers and dicots
cortex
Pith
Primary phloem
Secondary xylem
Secondary Phloem
Vessel element
Tracheids
Seive tube elements
lignin
Companion cells
Xylem cells arranged end to end on the top of one another
Long, narrow xylem cells with opening in their cell walls
Substances in the cell walls of dead tracheids
And the movement of substances
Due to tracheids it makes wood though
Support the phloem cells
The main phloem cells
buds
Nodes
Where leaves ae attached
Contains apical meristem
That produces new stem and leaves