Plants use photosynthesis to convert carbon dioxide and water into sugars using sunlight as an energy source, releasing oxygen as a byproduct. All organisms, including plants and animals, undergo respiration to break down sugars into carbon dioxide and water to release energy for cellular functions, with photosynthesis occurring in chloroplasts and respiration taking place in mitochondria.

1. Photosynthesis and Respiration

2. PHOTOSYNTHESIS
• Plants use light energy (for example sunlight)
to combine carbon dioxide and water to make
simple sugars.
• Plant cells also release oxygen gas.
• Once the sugars are formed, they are either
used by the plant or stored in the vacuoles.
• Photosynthesis occurs in the chloroplasts.
6CO2 + 6H2O + Energy --> C6H12O6 + 6O2

4. Aerobic RESPIRATION
• All organisms, including plants and
animals, break down simple sugars into carbon
dioxide and water and release energy.
• The cell uses the energy to build, repair, and
reproduce cells.
• Respiration occurs in the mitochondria of cells.
C6H12O6 + 6O2 = 6CO2 + 6H2O + Energy