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Genetic information is stored in DNA. Your entire set of DNA can be found in (almost) every single cell of the body. This DNA resides in the nucleus of each cell and is organised into 23 chromosome pairs.

Osmosis is defined as the movement of water from an area of high water potential to an area of lower water potential, across a partially permeable membrane. This means that water molecules moves from a very ...

They act as energy centres for a cell and provide a cell with energy needed to function.

Carbon is removed from the air by plants during Photosynthesis as they need this to make energy. Oppositely, respiration takes in O2 and releases CO2 to the atmosphere. CO2 is also released in to the atmosph...

One cell thick - short diffusion distanceLarge surface area to volume ratio - enables efficient diffusionGood ventilation of air in alveoli - enables constant concentration gradientGood capillary blood suppl...