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the process whereby useful molecules, such as glucose and amino acids, as well as water and salts, are selectively re-absorbed from the filtrate in the nephron tubules into the blood capillaries.
water that is found on the surface of the earth, e.g. in rivers, streams, and lakes etc.
the effect of the relative lengths of daylight and darkness on the physiology and behaviour of...
(also called egestion or elimination) the process of passing faeces out through the anus.