Quiz

Heart and Lungs: Can You Score 8 Out of 10?

Create exactly 10 evergreen multiple-choice questions covering circulation, breathing, oxygen, exercise response. Use four meaningful options, one correct answer, a concise factual explanation, balanced difficulty, and score bands for 0-3, 4-6, 7-8 and 9-10.

• #human-body
• #scored_quiz
• #standard