ICSE Class 6 Biology Respiratory System
- what is cellular respiration
- How does diaphgram?
- How diaphragm look
- why carbon dioxide come out because we take oxygen so why not oxygen come out
- what is the diphram?
- What is the function of lungs
- Why do we need to breathe
- What is the role of Nassal passages in respiratory system
- What is respiratory tract???
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