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Key
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Osmosis ­ The movement of water molecules from an area of high concentration (weak
solute solution) to an area of low concentration (stronger solute solution), across a partially
permeable membrane.
Active Transport ­ The movement of particles from an area of low concentration to an area
of high concentration, this requires energy.…read more

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Diffusion
Diffusion is the movement of particles from an area of high concentration to an area of low
concentration while there is a concentration gradient. It occurs In the lungs, the blood will
continue to take in oxygen from the alveolar air spaces provided the concentration of oxygen
there is greater than in the blood. Oxygen diffuses across the alveolar walls into the blood,
and the circulation takes the oxygen-rich blood away.…read more

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Animal
s…read more

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