May not be right, but because of Oxygen and the growing of new skin? We rub our skin without noticing and it will become frail and rub off, creating new skin
Answer: Solubility in lipids
Explanation:
All the volatile anaesthetic agents has dose dependent respiratory depression VT and MV which may be compensated by increased respiratory rate.
The respiratory depression is more common in case of older people as they cannot compensate for the volume of air.
The solubility of the anesthesia in the lipids can be a risk which can put 85 year old women into respiratory depression.
If the earth didn't rotate, currents would flow in straight lines from pole to equator. :)