ZIMSEC O-Level Combined Science
7.1.4Respiratory systems
Respiratory systems in ZIMSEC O-Level Combined Science: what the syllabus expects you to know, the learning objectives and how to practise.
Topic110 practice questions5 lessons
Overview
Forms 1 to 4.
In this topic
Lessons
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Inspired and expired air, and breathing during exercise
18 min
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Tests for gases
25 min
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The breathing system and ventilation
18 min
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Anaerobic respiration
15 min
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Respiration and aerobic respiration
18 min
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Sample question
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