Under one popular theory, the phrase cockles of your heart is derived from the Latin description for the heart's chambers, cochleae cordis. It is believed that the word cockles is a corrupted version of cochleae, most likely entering the popular vernacular as a form of slang.here actually aren't any cockles of your heart, but the term may come from the fact that the chambers of the heart resemble a mollusk's shell, also called a cockle. View slideshow of images above.
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