respiration

• Respiration is a chemical reaction
• Respiration happens in every cell or every living organism
• Respiration is the process of releasing energy from glucose
• The energy released by respiration is used for all the other chemical reactions that keep you alive
• Anaerobic respiration needs plenty of oxygen
• Aerobic respiration is respiration using oxygen and takes place in the mitochondria of animal and plant cells
• In aerobic respiration, glucose and oxygen react to produce carbon dioxide and water. This releases a lot of energy.
• Aerobic respiration:

  glucose + oxygen -> carbon dioxide + water
• Photosynthesis:

  carbon dioxide + water -> glucose + oxygen
• Anaerobic respiration takes place without oxygen.
• Anaerobic respiration is less efficient, so it releases less energy.
• Anaerobic respiration usually only happens when the cells cant get enough oxygen.
• Anaerobic respiration is different in different organisms.
• In humans, anaerobic respiration produces a substance called lactic acid, it can build up in your muscles and become painful
• Anaerobic respiration (humans):

  glucose -> lactic acid + energy
• In microorganisms like yeast, anaerobic respiration produces carbon dioxide and ethanol. ( glucose -> carbon dioxide + ethanol)

  When anaerobic respiration produces ethanol, its called fermentation, which is the process to make beer.