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7. There are three body systems that work together during cellular respiration. These are _______
A. respiratory, circulatory, and digestive C. respiratory, muscular, circulatory
are
B. respiratory, skeletal, circulatory
D. respiratory, circulatory, endocrine​


Sagot :

Answer:

A

Explanation:

the respiratory system brings oxygen into the lungs when you breathe. The disgestive system breaks food down into nutrients such a glucose.Now the circulatory system enters the picture.It transport glucose and other nutrients from the disgestive systems to the cell.