You Think You Work Hard

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You Think You Work Hard
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ALL organisms require energy to do work!
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The source for most energy that is generated and
used in living things is the sun!
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Photosynthesis is the process by which plants use
energy from the sun to produce sugar.

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This process begins in the leaves where most of
the plants chloroplasts are found. These
receptors act as solar receptors collecting the
suns energy for photosynthesis.
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Photosynthesis requires 3 reactants (or raw
materials) to begin.

• Radiant Energy
• Carbon Dioxide
• Water

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The chloroplasts in the leaves absorb the radiant
energy from the sun.
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Water enter the plant through the roots and
travels to the leaves.
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Carbon Dioxide enters a plant directly through
its leaves (via the stoma).
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The products of photosynthesis are sugar
(glucose) and oxygen.

• The sugar is carried from the leaves to the rest
  of the plant to provide chemical energy.
• The oxygen exits the plant through the stoma in
  the leaves and enters the atmosphere.

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Photosynthesis

• Radiant energy 6CO2 6
  H2O
• (sunlight) (carbon dioxide) (water)
• ?
• C6H12O2 O2
• (glucose) (oxygen)

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• The chemical energy generated during
  photosynthesis allows plants to take up important
  nutrients, such as nitrogen from the soil.

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It also allows the plants to grow!

• As the plants grow, they are eaten and provide
  food for other living things.

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Plants give off oxygen, which is then taken in
and used by other organisms for life processes,
including respiration.
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The carbon dioxide released by organisms as they
carry out respiration is then taken in by plants
for use in photosynthesis.
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Cellular Respiration

• Once photosynthesis is concluded in the plant,
  usable chemical energy is available to those
  animals that might eat the plants, but they
  cannot use the energy in this form.

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The animal must break the chemical bonds in the
glucose formed by photosynthesis and release the
stored energy.
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Cellular respiration is the process of converting
glucose molecules into usable energy. This
breakdown of the sugar molecules occurs in the
cells mitochondria.
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Cellular respiration makes the usable energy
molecules called ATP.
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Cellular Respiration

• C6H12O2 O2
• (glucose) (oxygen)
• ?
• ATP 6CO2 6 H2O
• (energy) (carbon dioxide) (water)

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The reactants for one process are the products
for the other. SO
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Without photosynthesis, cellular respiration
could not occur. Without cellular respiration,
photosynthesis could not occur.