Transcript PowerPoint - The Science Queen

Plant Parts
What is in a plant?
Why are plants important?
Plants are essential for life on our
planet. They provide all the energy for
the ecosystem, because they can get
energy directly from sunlight.
Humans need plants to breathe, eat,
for clothing, medicine, and housing.
What do MOST plants have in
common?
ALL plants have cell walls &
chloroplasts.
Most plants have some form of roots,
stems and leaves.
Let’s start at the bottom…
Roots
structures designed
to pull water and
minerals from
whatever material
the plant sits on.
provide support for
plants in the form of
an anchor in the soil.
Stems
Transport food &
water.
Act as support
structures for the
plant.
Stores food.
Main part of the
vascular system of
the plant.
Picture from http://biology4kids.com/files/plants_main.html
Plant Vascular System
Just like your body has
the circulatory system
(Veins, heart, blood,
etc) to transport food &
water to your cells and
waste away from the
cells, plants have a
vascular system.
The main parts are
called the xylem and
phloem.
Xylem
System of tubes and transport
cells that circulates water and
dissolved minerals from the roots
up to the rest of the plant.
Xylem is made of vessels that are
connected end to end for the
maximum speed to move water
around.
Picture From
http://www.mrcorfe.com/KS4/Edexcel/Biology/B23-EnergyFlow/images/Transpiration.jpg
Picture from http://biology4kids.com/files/plants_main.html
Xylem under an
electron
microscope.
They also have a secondary
function of support. When
someone cuts an old tree down,
they reveal a set of rings. Those
rings are the remains of old xylem
tissue, one ring for every year the
tree was alive.
Image from
http://www.jic.ac.uk/microscopy/Gallery/data/images1/stem
_zinnia_leaf_xylem.jpg
Phloem
Pipes or tubes in the
plant that transports
the sugars and
other molecules
created by the
plant’s leaves r
down to the rest of
the plant .
Picture from http://www.paintthelight.net/BotanyProject/Activities/adaption_plants.htm
Finally…we made it to the leaves.
Uses a process
known as
photosynthesis
which uses light to
turn carbon dioxide
and water into
sugar.
Transpiration
Transpiration is a process where water is
lost as vapor from leaves through the
opening of the stomata.
The opening and closing of the stomata
regulates the rate of transpiration in a
plant.
Transpiration is similar to perspiration in
humans. Both are functions of the
organism to regulate body temperature.
<http://techalive.mtu.edu/meec/module01/images/transpiration.j
pg>
References
Radar’s Biology
for Kids
http://biology4ki
ds.com/files/plan
ts_main.html