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|the cells of the human body need what to survive?
|what dose the cells of your body need these to survive
|the tube that connects to the mouth to the stomach is?
|when you inhale you you breathe is
|the two spongy bags in your chest are
|when you exhale you breath out
|the number of times a person inhales in one minute is your what
|this substance begins the chemichal break down of food is
|this helps the movement of food through the digestive system is
|what is the prosses of food