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The frog heart has three chambers: two atria and a single ventricle.
An animal with a two-chambered heart belongs to the group of animals called "fish." Most fish have a two-chambered heart with one atrium and one ventricle.
Fish are the animal group that have two-chambered hearts. Reptiles and amphibians have three-chambered hearts and mammals have four-chambered hearts.
Fish are the animal group that have two-chambered hearts. Reptiles and amphibians have three-chambered hearts and mammals have four-chambered hearts.
Fish are the animal group that have two-chambered hearts. Reptiles and amphibians have three-chambered hearts and mammals have four-chambered hearts.
Octopuses have three hearts. Two pump blood through the gills, while the third pumps oxygenated blood through the rest of the body.
There are not any insects that have two hearts. There may be other types of organs that do the same thing that a heart would though.
All mammals have a four chambered heart. Most reptiles have a three chambered heart, with the exception of the crocodile which has four.
The term "chamber" is absolutely applicable to science. Portions of animal hearts are divided into so called "chambers." The human heart is comprised of four chambers. The heart of a fish is made up of three chambers.
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A name for a three-legged animal could be a "tripod."