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Revision about Respiratory & Circulatory Systems

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  • There are 2 transport tubes in the plant.
    True
  • In the dark, plants respire and gives out carbon dioxide.
    True
  • Nitrogen in the air is used by bacteria to help plants grow.
    True
  • When running, we breathe in faster to get more oxygen.
    True
  • The heart pumps blood to ensure that oxygen is transported to all parts of the body.
    True
  • The nose has tiny hairs to filter air.
    True
  • Gaseous exchange takes place in the gills of the dolphin.
    False
  • Heart is part of the respiratory system.
    False
  • At the muscles, oxygen is used for respiration.
    True
  • Blood going to the lungs is rich in oxygen.
    False
  • In the human body, blood goes through the heart twice.
    True
  • Blood vessels carry blood to all parts of the body.
    True
  • Food-carrying tubes can only be found in the leaves.
    False
  • Leaves have tiny openings under to allow gases to move in and out.
    True
  • Respiration means inhaling air.
    False
  • Plants take in carbon dioxide in the light.
    True
  • Inhaled air is air that you breathe out.
    False
  • Blood that came from the lungs is rich in oxygen.
    True
  • Lungs is where gaseous exchange happens.
    True
  • Helium is the main component of the air we breathe in.
    False
  • Exhaled air has more carbon dioxide than inhaled air.
    True
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