The differences between a two chambered heart and a four chambered heart.

Explain the differences in respect to the organization and the circulatory pattern between the relatively simple two-chambered heart to the more complicated four chambered heart.

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A three-chambered heart has one ventricle and two atria that are not completely separated. Only one pressure of blood is pumped out of the heart. As a result of the incomplete separation and the single ventricle, there is mixing of oxygenated and deoxygenated blood. This type of heart is seen in animals that rely on gills and ...