Question

What is the percentage of gas in the human body?

Answer 1

What do you mean by percentage of gas in human body?

Explanation:

There is no free gas in human body anywhere.
Lungs are filled with atmospheric gases and humidity. There is 5% humidity in alveolar sac.
Arterial blood is with 20 vol of oxygen. It means 14 gms of hemoglobin holds 20 ml of oxygen.
Venous blood is with 15% of oxygen with same amount of hemoglobin. It also holds 5ml of Carbon dioxide.
Alimentary canal is without any oxygen. It is with released gases from digested and putrefied food.