True or False: Our body cells produce carbon dioxide during respiration.
True
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seesaw
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rocket
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fairy
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thief
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gold
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shark
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banana
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15
True or False: Exhaled air contains much more carbon dioxide than oxygen.
False
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15
What happens to our ribcage and diaphragm when we exhale?
Our ribcage moves downwards and inwards while our diaphragm relaxes and moves upwards.
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15
Why are gills rich in blood?
Oxygen is transported in the blood. The gills have a lot of blood vessels to increase the efficiency of gas exchange or to be able to absorb oxygen more quickly
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15
What happens to our ribcage and diaphragm when we breathe in?
The ribcage moves upwards and outwards while the diaphragm contracts and moves downwards.
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15
True or False: The unoxygenated blood enters the right lower chamber and sends to the left upper chamber for gas exchange.
False. The unoxygenated blood enters the right upper chamber.
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15
Earthworms and frogs have thin and ____________________ for breathing.
moist skin
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15
What is the function of stomata? a. To trap more sunlight for making food b. To allow only the exit of oxygen c. To allow the intake of carbon dioxide and the release of oxygen d. For photosynthesis
C
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magnet
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fairy
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15
True or False: The heart is a muscular organ.
True
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15
True or False: Inhaled air is mostly made up of nitrogen, some oxygen and very small amount of carbon dioxide, water vapour and other gases.
True
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15
True or False: A. The right upper chamber of our heart receives the unoxygenated blood while the left upper chamber of our heart receives oxygenated blood from the lungs.
True
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15
What are xylem?
Water-carrying tubes. They carry water and dissolved mineral salts absorbed by the roots from the soil to all other parts of the plant.
