Key term for Edexcel GCSE Biology, used in The Circulatory System.
Half-moon shaped valves located at the base of the aorta and pulmonary artery that prevent backflow into the ventricles.
Semilunar (SL) valves appears in Edexcel GCSE Biology revision content for Exchange and Transport in Animals, especially The Circulatory System and Heart and Circulatory System.
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