The myocardium of the right ventricle is thinner than that of the left ventricle. What evolutionary pressure seems to have favored this muscle distribution?

 The myocardium of the right ventricle is thinner than that of the left ventricle. What evolutionary pressure seems to have favored this muscle distribution?

Pressures are lower in the right ventricle because blood pumped by the right side travels only to the lungs located close to the heart.

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