Osmosis is the diffusion of water molecules from a dilute solution to a more concentrated solution across a selectively permeable membrane. The circulatory system Blood is pumped away from the ...

Systems biology is the study of biological systems whose behaviour cannot be reduced to the linear sum of their parts’ functions. Systems biology does not necessarily involve large numbers of ...

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In mammals the heart is a double pump. The right side pumps deoxygenated blood to the lungs and the left side pumps oxygenated blood to the rest of the body tissues. This means that a red blood ...

Biology — the science of life, living things and the processes that keep us all running — links up in essential ways with ...