Diagram of the dermal tissue on the stem of a plant
Dermal Tissue:
Epidermis Tissue: The
outer layer of the plant that protects it against the environment. The
epidermal tissue is also responsible for the consumption of water (roots) and
gases (stomatas). The roots of the plant contain root hairs that absorb water
and minerals from the soil. Stomatas are openings on the plant’s leaves that
absorb gases from the air and transform the gases into oxygen.
Peridium Tissue: The layers of tissue directly underneath
the epidermal tissue. The peridium tissues are responsible for replacing damaged
epidermal tissue and act as insulation for the plant.
Ground Tissue:
Parenchyma Cells: Absorbs sugars and other nutrients during
photosynthesis and stores them in the plant.
Collenchyma Cells: Act as the “bones” of the plant. The
cells have thick walls that act as support systems for the plants stems and
leaves.
Vascular Tissue:
Xylem: Cells that transport the minerals through tubes that
run through the whole plant.
Phloem: Transports glucose and other nutrients through the
plant during photosynthesis.