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B
Ventricles
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C
Pinna
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D
Eyes
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Solution
The correct option is A Ventricles The papillary muscles attach to the lower portion of the interior wall of the ventricles. They connect to the chordae tendineae, which attach to the tricuspid valve in the right ventricle and the mitral valve in the left ventricle. They support the tricuspid valves and mitral valves. The contraction of the papillary muscles closes the valves.