Freebase(0.00 / 0 votes)Rate this definition: Limpet. Limpet is a common name for a number of different groups of sea snails and freshwater snails. The common name is applied to those snails that have a simple shell which is broadly conical in shape, and either is not spirally coiled, or appears not to be coiled in the adult snail.
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Rating Newest Oldest. Best Answer: I hope this helps: Mitral valve allows the blood to flow from the left atrium into the left ventricle. The tricuspid valve is the three flapped valve on the right side of the heart, between the right atrium and the right ventricle which stops the backflow of blood between the two.E: Valves that prevent backflow in the heart? What valve prevents back-flow into the left ventricle? What valve prevents back-flow into the right atrium? What valve prevents back-flow into the left atrium?