Out of the circulatory system, respiratory system, muscular system, skeletal system, and nervous system, which body system do you think is the most important? List 3 reasons why you think so.

The Circulatory System is most important.

Explanation:

It is important because the circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide.

stratosphere: as the altitude increases, the air temperature increases. the stratosphere has a layer of ozone, called the ozone layer. this layer absorbs most of the ultraviolet radiation from sunlight. this results in the stratosphere being warmer.

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