Transcript Organs in Animals & Plants WHAT IS AN ORGAN?

Organs in
Animals & Plants
WHAT IS AN ORGAN?
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An organ is a number of
tissues that work
together to perform a
specialized function.
Plants and animals
are larger, more
complex organisms
that rely on many
different organs to
work together in order
to survive.
The Most Selfish
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The brain receives all of
the sensory info gathered
by the body and
coordinates our
responses to various
stimuli (environmental
changes).
The brain is mainly
composed of nervous
tissue.
It is also the favourite
snack of zombies!
The Most Underrated
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The skin is the largest organ
in our body. It’s main
purpose is to protect the
body from pathogens –
disease causing entities.
The skin also sweats which
allows for temperature
control of the body.
The skin is composed of
epithelial, and connective
tissue. It also contains many
nerve endings.
The Hardest Working
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The heart pumps the blood
throughout the body.
Vital because blood
circulation allows all of the
organs share their
contribution to our health
with each other.
Blood carries oxygen, sugar,
proteins, hormones and a
number of other important
substances that must be
shared with all cells in the
body.
The heart is composed of
muscle, epithelial and
nervous tissue.
The Wimpiest
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The lungs are responsible
for gas exchange between the
blood and the air around us.
Oxygen enters the blood
while carbon dioxide exits
the blood.
The alveoli are tiny sacs,
resembling grapes, where the
gas exchange occurs. They
are surrounded by capillaries
– the smallest blood vessels
that are designed for trading
between blood and cells.
The lungs are composed of
epithelial and connective
tissue.
The Luckiest
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The organs that digest your
food have it pretty good.
(Ask Mr. Chen!)
The entire digestive tract
(tube) is composed of all
four tissue types.
The esophagus is you food
tube that leads down to your
stomach.
The stomach is a sac that
contains both digestive
enzymes and acid that break
down food.
Still Lucky!...Well not really…
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The small intestine is
the site where the
nutrient from your food
are absorbed into the
blood so they can be
delivered to the cells.
The large intestine has
the “crappy” job of
taking the unused and
indigestible material,
mixing it with water, and
making feces out of it.
Plant Organs – Roots & Stem
Roots
 Anchor the plant and absorb
water.
 Composed of epidermal,
meristematic and ground
tissue.
Stem
 Supports the leaves and
flowers and transports water
and nutrients through the
plant.
 Composed of epidermal,
vascular and ground tissue.
Plant Organs – Leaves & Flowers
Leaves
 Carry out photosynthesis in
order to make glucose.
 Composed of epidermal,
vascular and ground tissue.
Flowers
 The sexual organs of plants.
They are used for
reproduction.
 Composed mostly of
meristematic tissue.
Who has both ground tissue and
nervous tissue and loves flowers?