Respiration occurs in all living organisms, it is the process of mixing glucose from cells that have been stored inside of the body from various sources, with oxygen to produce carbon dioxide, water and energy (however energy is not a substance) the word specific equation 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, photosynthesizing algae, and bacteria, the respiration process begins with photosynthesis. The body uses energy from the sun 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 molecules smaller ones 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 glucose stored in the cells to produce carbon dioxide, which is a waste product of respiration , there is a small amount left. behind and stored for photosynthesis. Some of the water produced evaporates as water vapor through the stomata and lenticels, and the energy is used for various body processes. 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 when consuming food sources is mixed with oxygen from the atmosphere in the cells and carbon dioxide, which is one of the two wastes, is released into the atmosphere. Like plants, the energy produced by respiration is used to carry out life processes. ...... middle of paper ...... sediment. This sediment eventually forms limestone, this limestone is forced below the earth's surface by heat and pressure, it forms metamorphic rock, which then rises higher where underground hot spots are present, and ultimately this Carbon is released again in the form of volcanic material, such as magma and rock, where it returns to 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. Carbon stays in limestone and oil for millions of years, carbon stored in oil continues the cycle when drilled and burned by humans, releasing all the carbon into the atmosphere and the cycle start again. The carbon cycle consists of many interrelated stages, without which life on Earth could not be sustainable..