Read before you practise · 3 min
Read the Full Route of Oxygen through the Body
Respiration links air movement to gas exchange, blood transport and cellular use.
NSEB · Breathing and Exchange of Gases · 1 linked question · 100% coverage
Know this first
Living-system questions are solved by matching a structure or organism to its function, process and stated condition.
Structure · The part being namedFunction · What that part doesCondition · The situation that changes the answer
Study deeper: NCERT Biology · Breathing and Exchange of Gases
Follow the ordered route
Pulmonary ventilation brings air to alveoli; gases diffuse between alveoli and blood; blood transports them; O₂ and CO₂ diffuse between blood and tissues; cells use O₂ in catabolism and release CO₂.
OlympIQ exam lens
- ✓Ventilation → alveolar diffusion → blood transport → tissue diffusion → cellular use.
OlympIQ trap
Ventilation is only the first stage; cellular respiration happens after oxygen reaches tissues.
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