Which statement is true?
1.The circulatory system along with the respiratory system helps get oxygen to every muscle in the body.
2.Body temperature is controlled by the temperature outside
3.Red blood cells help heal wounds.
4.Humans need Carbon Dioxide in order to live.

idk

Explanation:

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.