Blood, the heart, circulation and respiration

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Question 26
Easy

A simplified diagram of the human heart in cross-section.

What happens when the left ventricle contracts?

Valve Y opens

Valve Y closes

Blood is forced back into the left atrium

Blood is forced into the pulmonary vein

Blood, the heart, circulation and respiration Questions

  1. GCSE
  2. /Biology
  3. /Blood, the heart, circulation and respiration