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the protective layer of fibrous connective tissue which surrounds each kidney.
animals that lack a cavity between the digestive tract and the outer body wall.
is a medical condition in which excess body fat has accumulated to the extent that it may have...
the introduction of harmful substances (pollutants) into the environment.
when an animal accumulates body fat or stores food resources during warmer periods and becomes...
a complex organic substance needed by the body in small amounts for normal growth and...