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The digestive system break down the food we eat into smaller molecules your body absorb. The stomach and intestines organs of digestive system.
All living thing have 3 vital functions: Nutrition,Interaction and Reproduction
The repiratory system absorb oxigen into the body. the lungs and the trachea are organs the respiratory system.
external internAL
The circulatory system transport blood all over the body . the heart is organ the circulatory system
when you go outside and it's cold and that feeling is the brain
and once already arrived infronmacion your body reacts and get your coat
for example, when we feel too hot , our body sweat
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