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How Our Body Works
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When we breathe out, this gas leaves the lungs through the nose.
Carbon di oxide
What protects the lungs from getting injured?
ribcage
Which organ system uses oxygen to break down food to get energy?
Respiratory system
Which is the harmful sticky substance formed on the tooth?
plaque
Which is the hardest substance in our body?
Enamel
How many permanent teeth do we have?
32
Which organ absorbs water from the undigested food?
Large Intestine
Where does digestion begins?
Mouth
What breaks down the food in Stomach?
Digestive juices
Which organ has tiny air sacs?
Lungs
What is the breaking down of food into a simpler form called?
Digestion