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Pelicans and humans require a more complex heart to efficiently support their active lifestyles and meet the high metabolic demands of their bodies. A four-chambered heart allows for the separation of oxygenated and deoxygenated blood, ensuring that tissues receive a constant supply of oxygen-rich blood. This efficiency is crucial for activities such as flying in pelicans and maintaining energy levels in humans. Additionally, a more complex heart facilitates better regulation of blood flow and pressure, which is essential for both species' survival and adaptation to their environments.

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2w ago

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