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Type: Multiple-Choice
Category: Circulatory and Immune Systems
Level: Grade 9
Score: 1
Author: sinijk
Last Modified: 7 years ago

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Circulatory and Immune Systems Question

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Grade 9 Circulatory and Immune Systems

The                 between the left atrium and left ventricle prevents blood from flowing backward to the atrium.
  1. mitral valve
  2. tricuspid valve
  3. pulmonary valve