In the morning, an athlete eats a nutritious breakfast to get energy to exercise. What are the main organ systems involved in the process of food from the athlete’s breakfast being broken down into nutrients and then delivered to the cells?

B. Digestive and circulatory system

Explanation:

The digestive system is involved in the break down of food from the mouth to the anus. And Circulatory system is a system that delivers nutrients, oxygen, elements like Iron (Fe).

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