What substance is most important for maintaining a stable thermal environment within the human body?

Water.

Explanation:

The human body uses water in the cells, tissues and organs to regulate its thermal environment and maintain other bodily functions. This is because water has the capacity to regulate the internal temperature of the body in response to the external temperature. This can be done through sweat, since when the external temperature is high, sweat prevents overheating of the body. So at a high temperature, the evaporation of sweat brings a loss of heat and reduces the internal temperature.

Because the body loses water through sweating, digestion and urination, especially during exercise and high temperatures, it's important to rehydrate by drinking fluids.

the right answer is a. skin cells forming from sunlight.

the liver is an organ endowed with a fantastic ability to regenerate

. thus, if a hepatectomy (ablation) of 70% of the hepatic mass is performed in the rat, there is complete recovery in 7 to 10 days.

prokaryotes are beings that have existed since the existence of life on earth, and do not come from another realm.

ribosomes are organelles that exist naturally in eukaryotes, either in free form or attached to the endoplasmic reticulum.

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well, i believe that the answer is 2. : 3