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The mechanisms for that process constitute the excretory systems, particularly
such organs of vertebrate animals as elaborate and complicated as the kidney
and its associated urinary ducts. GENERAL FEATURES Definitions and
In primitive marine animals the blood is almost identical with seawater in
composition; in typical freshwater animals the concentration of the blood is about
half that of seawater. Many originally marine animals have evolved the ability to
live in ...
animal takes up nutrients from outside. Movements performed for this purpose
are termed feeding behaviour. NUTRITIONAL REQUIREMENTS OF HIGHER
ANIMALS Cells use nutrients as fuel for energy production (catabolism) ond as ...
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This is the 198215th Edition, in two halves, with the Macropaedia and the Micropaedia. First published in 1768, the publisher is the oldest English-language encyclopedia still in print. Two Scottish ... Read full review