Respiration occurs in all living organisms, it is the process of mixing glucose from cells that has been stored within the organism from various sources, with oxygen to produce carbon dioxide, water and energy (however energy is not a substance) the specific word for cellular aerobics (in the presence of oxygen) is glucose and oxygen → carbon dioxide, water and energy. This energy produced can then be used for essential life processes and growth. For plants, plant roots, algae and photosynthesizing bacteria, the process of respiration begins with photosynthesis. The organism uses the sun's energy to combine with carbon dioxide from the atmosphere and water to form carbohydrates, which are stored in cells as starch, and this starch is broken down into smaller molecules such as glucose when this energy is required. Then, the plant diffuses oxygen from the atmosphere through the stomata, which are small holes in the leaf, this oxygen is mixed with the glucose stored in the cells to produce carbon dioxide, which is a waste product of respiration, a small amount remains quantity behind and stored for photosynthesis. Part of the water produced is evaporated as water vapor through the stomata and lenticels, and the energy is used for various processes in the organism. Animals such as insects, mammals, reptiles, birds and aquatic animals all have different respiratory systems, however the basic process of respiration remains the same, glucose obtained from consuming food sources is mixed with oxygen present in the atmosphere in the cells and carbon dioxide, which is one of the 2 waste products, is released into the atmosphere. Like plants, the energy produced by respiration is used to carry out life processes. ...... half of the paper ...... sediment. This sediment eventually forms limestone, this limestone is pushed beneath the earth's surface through heat and pressure, forms a metamorphic rock, which then rises higher where there are hot spots beneath the ground, and eventually this carbon is released back into the form of volcanic matter, such as magma and rock, where it is once again found in the atmosphere. The cycle can continue from sediments on the ocean floor to the formation of oil, under the right combinations of heat and pressure. The carbon remains in both the limestone and the oil for millions of years, the carbon stored in the oil continues the cycle when it is drilled and burned by humans, this releases all the carbon into the atmosphere and the cycle starts again. The carbon cycle consists of numerous interconnected phases and without it life on earth could not be sustained.