Why are frog kidneys considered filters?
They "filter" - remove - undesirable components (wastes) from the bloodstream.
A "filter" is any mechanism that selectively passes or retains something, be it particles, chemical elements, or wavelengths of light or sound. ALL kidneys are biological filters.
To avoid a toxic (deadly) buildup of waste product compounds in the system, kidneys filter specific waste product compounds out of the bloodstream.
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Frog kidneys are considered filters because they play a crucial role in removing waste products, excess salts, and water from the blood, thus filtering the blood to regulate the composition of bodily fluids and maintain homeostasis.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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