Multiple choice general knowledge

In human respiration process which gas is inhaled

  1. Carbon dioxide

  2. Oxygen

  3. Hydrogen

  4. Helium

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

During inhalation, humans take in oxygen which is essential for cellular respiration. This oxygen binds to hemoglobin in red blood cells and is transported throughout the body to produce energy.