Nephiridia remove metabolic wastes from the body of animals.
These are found in invertebrate animals. These are equivalent to
kidneys of vertebrate animals.
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This refers to the metabolic RATE of metabolism at rest.
Maximum sustained rate is about 10 times higher.
Minimum (when you're sleeping) is about 60 to 75% of basal.
For an adult human it's equivalent of consuming about 250 cc of
Oxygen per minute.
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Urine and sweat are examples of metabolic wastes. Feaces are NOT
metabolic wastes.