2. Plant Tissues
A tissue is a group of cells organized to form a
functional unit or a structural unit.
Plants have 4 tissue systems:
Ground tissue
Vascular tissue (xylem and phloem)
Dermal tissue (exterior)
Meristematic tissues
3.
4.
5. Ground Tissue
Parenchyma
Found throughout the plant, these tissues perform
important functions like photosynthesis, food
storage, and secretion
Collenchyma
Structural support in herbaceous plants
Found just under the stem epidermis and along leaf
veins
Sclerenchyma
Hard structural support (trees)
May be alive or dead and still function structurally
One type of sclerenchyma is fiber (wood)
6.
7. Dermal
Epidermis - outermost layer composed of
single layer of ground parenchyma cells.
Periderm - many layers thick, found on
woody plants, replaces epidermis,
parenchyma cells.
8.
9.
10.
11.
12. Xylem and Phloem
Both add structural support
Xylem - conducts water and minerals, long
tapering cells that act as pipes of a sort
Phloem - conducts food
13. Vascular Cylinder
Xylem
Tissue whose basic function is to
transport water but will transport some
minerals
Phloem
Tissue whose basic function is to
transport sugars throughout the plant
