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Digestion and Respiration

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  • How many lungs do we have?
    We have two lungs.
  • Where does food go after it is chewed and swallowed?
    It goes to the esophagus.
  • Where in the body does most of the absorbtion of nutrients take place?
    In the small intestine.
  • What gasses do we breathe in and out?
    We breathe in oxygen and breathe out carbon dioxide.
  • Where does digestion start?
    It starts in the mouth.
  • How does air enter the respiratory system?
    Air enteres through the nose and mouth.
  • What is the purpose of saliva?
    Saliva makes food easier to chew and swallow.
  • Name the two intestines.
    The large intestine and the small intestine.
  • Where does gas exchange happen?
    Gas exchange happens in the alveoli.
  • What long tube connects the mouth to the stomach?
    The oesophagus connects the mouth to the stomach.
  • What is produced by the liver to help digestion?
    Bile is produced in the liver.
  • After nutrients are absorbed, how are they delivered to the rest of the body?
    Nutrients are delivered through the bloodstream.
  • What are the tiny tubes inside the lungs that lead air into the air sacs?
    The bronchioles.
  • What happens if food goes down the trachea instead of the esophagus?
    You could choke.
  • What is the main tube that carries air to your lungs?
    The trachea.
  • What are the short branches located at the lower end of the trachea that carry air into the lungs?
    They are the bronchi.
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