There are 6 elements that are the most important. The acronym, CHNOPS, is an easy way to remember these.
C - Carbon
H - Hydrogen
N - Nitrogen
O - Oxygen
P - Phosphorous
S - Sulfur
I believe that the disadvantages outway the advantages. Afterall we want to stay healthy and live longer.
The answer for this should be D
The respiratory system that allows for Gas Exchange happens between Alveolar Spaces and Capillaries
