Is it part of the circulatory system ?, Yes it is , No it isn't , Is it part of the circulatory system ?, Yes it is , No it isn't , Is it part of the circulatory system ?, Yes it is , No it isn't , Is it part of the circulatory system ?, Yes it is , No it isn't , Is it part of the circulatory system ?, Yes it is , No it isn't , Choose the correct option: Brain , internal organ , external organ , Choose the correct option: ears , internal organ , external organ , Choose the correct option: eyes, internal organ , external organ , Choose the correct option: lungs, internal organ , external organ , Choose the correct option: stomach, internal organ , external organ , Choose the correct option: skin, internal organ , external organ , the teeth and saliva break up the food here , stomach , mouth , intestine, the food waste goes through here, stomach , mouth , intestine, strong acid starts to break down the food, stomach , mouth , intestine, What's the correct system for this organ? , digestive system , respiratory system , circulatory system , Nervous system , What's the correct system for this organ? , digestive system , respiratory system , circulatory system , Nervous system , What's the correct system for this organ? , digestive system , respiratory system , circulatory system , Nervous system , What's the correct system for this organ? , digestive system , respiratory system , circulatory system , Nervous system .

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