Explanation:
Inside the air sacs, oxygen moves across paper-thin walls to tiny blood vessels called capillaries and into your blood. A protein called haemoglobin in the red blood cells then carries the oxygen around your body.
Acronyms are abbreviations for words like what does it stand for and its basically used to make words stand out and turn long words shorter like for example. VIP is very important person, MVP is most valuable player, and YOLO is you only live once, things like those are meanings in just a small word.
The answer is Reductionism approach. Reductionism is any of a few related philosophical thoughts in regards to the relationship between marvels which can be portrayed as far as other less difficult or more essential wonders. Reductionism emphatically speaks to a specific viewpoint of causality. In a reductionist system, the marvels that can be clarified totally regarding relations between other more central wonders, are named epiphenomena.