Leather shoes are made of natural polymers.
Raincoats are made of synthetic polymers.
If you are thrown into the the river by somebody, inside your alveoli will has water. if your are killed by other than you don't have water inside your alveoli
First it is fermented, then it is roasted and removed from its husk to produce the cocoa nibs. It is melted into chocolate liquor and pressed to remove the cacao butter from the fat.
Since the circulatory system has to deliver oxygenated blood and take deoxygenated one for it to be oxygenated again, it cannot do the exchange by itself but depend on the respiratory system foe exchange........im no expert. just trying