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Bony fishes, rays, and sharks have______ circulation with a two-chambered heart; while frogs and amphibians have a heart with_____ chambers and mammals have _____ heart.
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Bony fishes, rays, and sharks have______ circulation with a two-chambered heart; while frogs and amphibians have a heart with_____ chambers and mammals have _____ heart.

Bony fishes, rays, and sharks have______ circulation with a two-chambered heart; while-example-1
User Chrisjlee
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Bony fishes, rays, and sharks have closed circulation with a two-chambered heart; while frogs and amphibians have a heart with three chambers and mammals have four-chambered heart.

User Westandskif
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