During the process of nutrient absorption in animals, which two body systems are most responsible for breaking down food into smaller
pieces and distributing the nutrients to body cells?

Digestive system and Circulatory system

Explanation:

The Digestive system has the stomach, small and large intestine- these are all responsible for breaking down food into smaller pieces and on the other hand the circulatory system helps to distribute the broken food around the body for necessary absorption by the body cell.

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