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Humans have microscopic subunits in the kidneys called _____ to filter blood, and spiders have _____ to absorb salts and wastes.. . The choices are the following: nephridia; nephrons. nephrons; Malpighian tubules. setae; nephridia

User Peyton
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The right option here is the second choice listed - humans have miscroscopic subunits in the kidneys called nephrons to filter blood, and spiders have malpighian tubules to absorb salts and wastes.
User Bigandrewgold
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