Download plant tissues: vascular system

PLANT TISSUES:
VASCULAR TISSUES
The Circulatory
System of Plants!
The Vascular System
For plants to survive, they must…
 take in nutrients & water from environment
 transport water up to the leaves, and glucose back
down for storage
The plant’s vascular system is their “circulatory
system” designed to transport materials within the
plant!
Plant Tissues (Con’t):
Ground Tissue:


The internal nonvascular tissues are
called the parenchyma
(think flesh of a
watermelon)
Could be specialized
for storage, support,
photosynthesis, etc.
Plant Tissues (Con’t):
Meristematic Tissue:


Cells that can rapidly
divide by Mitosis
produce all growth in
plants
Apical Meristems are
found at the tips of
stems, roots, in rings
around the stems of
larger plants, etc.
Plant Tissues (Con’t):
Dermal Tissue:



Cells that protect the outer
layers of a plant –
epidermis is the outermost
layer.
These cells protect plants
from disease & predators,
and prevent water loss
(Cuticle).
Cork protects inner tissues
from injury.
Plant Tissues (Con’t):
Vascular Tissue:


Cells that specialize in
transport of water &
other substances
among cells
Two types of tissues:
–
–
Xylem
Phloem
Vascular Tissues (Con’t):
Xylem:


water-conducting cells from roots up to rest of the
plant
after maturation, these
cells die; leaving thickwalled, hollow cells that
are pitted or open at the
ends  ideal for water
transfer
Vascular Tissues (Con’t):
Phloem:


food-conducting cells from one part of plant to
another (mostly down
towards roots)
these living cells have
large pores at their
ends and share
cytoplasm ideal for
food transfer
Xylem and Phloem Compared…