Biology for IGCSE & O level - Transport In Animals (Section 1 - No. 19)
Which of the following best describes the pathway of blood through the heart and lungs?
Right atrium -> right ventricle -> lungs -> left atrium -> left ventricle
Left atrium -> left ventricle -> lungs -> right atrium -> right ventricle
Right atrium -> left atrium -> lungs -> right ventricle -> left ventricle
Left ventricle -> right ventricle -> lungs -> left atrium -> right atrium
Explanation
The correct pathway involves blood entering the right atrium, passing to the right ventricle, going to the lungs for oxygenation, returning to the left atrium, and then to the left ventricle for circulation to the body.
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