Explanation
When many people stay inside a closed room, they continuously breathe in oxygen and breathe out carbon dioxide during respiration.
As a result, the level of oxygen decreases while carbon dioxide increases in the room.
Human Respiration Process
Respiration is the biological process in which oxygen is taken into the body and carbon dioxide is released as a waste product after energy production.
Respiration Equation
Glucose + Oxygen → Carbon dioxide + Water + Energy (ATP)
Composition of Air (Approx.)
• Nitrogen → 78%
• Oxygen → 21%
• Carbon dioxide → 0.04%
• Other gases → Argon, Neon, etc.
Effects of Poor Ventilation
• Reduction in oxygen level
• Increase in carbon dioxide concentration
• Headache, dizziness, and suffocation
• Spread of airborne diseases
Important Related Concepts for Exams
Respiration → Process of energy release in living cells
Ventilation → Supply of fresh air in enclosed spaces
Photosynthesis → Plants absorb carbon dioxide and release oxygen
Green plants help maintain balance of oxygen and carbon dioxide in the atmosphere
Interesting Fact
Plants perform photosynthesis during daytime, absorbing carbon dioxide and releasing oxygen, which helps maintain the atmospheric gas balance.