The air around you is made up of 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide with respect to volume. The composition of what you exhale has 4-5% CO2. Since we can't count the...
When your arterial blood goes though arteries and capillaries, it is full of oxygen, so when it goes through the capillaries it gives all the O2 to cells and tissues and collects all kinds of...