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Nitrogen fixation is one stage of the nitrogen cycle. The nitrogen cycle describes the different transformations of the forms of nitrogen in nature. The nitrogen cycle is important because plants need nit...

glucose+oxygen-->water+carbon dioxide c6h12o6+6o2-->6h2o+6co2

Body temperature is regulated by a thermoregulatory centre in the brain, the hypothalamus. The hypothalamus can sense the temperature of the blood via receptors. The skin also contains temperature recepto...

As humans breathe in, the ribcage moves upwards and outwards. As this happens, the diaphragm flattens and moves down. This allows air to move into the lungs causing an increase in volume within the lungs....

There are 2 types of digestion: mechanical digestion and chemical digestion. Examples of mechanical digestion are: chewing - in the mouth; and churning - in the stomach. Chemical digestion involved enzyme...