What is the minimum number of nanocontainers that a person would need in their bloodstream to provide 1 hour's worth of oxygen?

I did some research and found that the average human requires 550 L of oxygen per day which means that :

(550 L O2 / day) x (1 day / 24 hours) = 22.9166667 L O2 / hour or 22916.67 mL O2 / hour

1 mL = 1 cm^3

22916.67 mL O2 / hour = 22916.67 cm^3 O2 / hour

Now convert that volume from cm^3 to nm^3

22916.67 cm^3 O2 / hour = 2.29167x10^25 nm^3 O2 / hour

So for 1 hour’s worth of O2, we need a volume of 2.29167x10^25 nm^3

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what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.