ANATOMY

Detailed explanation-1: -The atmospheric air consists of 78% of nitrogen, 21% of oxygen, 0.04% of carbon dioxide and 0.93% of argon and other inert gases.

Detailed explanation-2: -The air in Earth’s atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen. Air also has small amounts of other gases, too, such as carbon dioxide, neon, and hydrogen.

Detailed explanation-3: -The percentage of oxygen in inhaled air is 21%.

Detailed explanation-4: -In turn, exhaled air contains: nitrogen – 78% oxygen – 17% carbon dioxide – 4%

Detailed explanation-5: -Molecules in the air include primarily nitrogen and oxygen as well as water, carbon dioxide, ozone, and many other compounds in trace amounts, some created naturally, others the result of human activity. In addition to gases, the atmosphere contains extras such as smoke, dust, acid droplets, and pollen.