Science第 86 / 120 题
In the human body, which system is responsible for breaking down food into nutrients?
a.Respiratory system
b.Digestive system
c.Nervous system
d.Skeletal system
解析
The digestive system breaks food down into nutrients the body can absorb and use. The respiratory system handles gas exchange, and the nervous system sends signals. Digestion begins in the mouth and continues through the stomach and intestines.
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