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    A
    Is the second stage of the digestive process
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    B
    The heart expels ........
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    C
    There are very narrow vessels that connect arteries and veins
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    D
    Is the first stage of the digestive process
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    E
    Is the third stage of the digestive process
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    F
    ........ are formed in the large intestine
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    I
    During ........,your diaphragm contracts
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    L
    In this route the oxygen goes and comes back to the lungs
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    N
    The digestive system transform the food into .....
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    O
    We need this to survive
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    P
    Blood consists of ...... and blood cells
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    R
    We take oxygen and releases carbon dioxide
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    S
    The heart contracts and sends blood trough the arteries
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    U
    The excretory system consists in ......... .......... and the sweat glands
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    V
    The gas exchange takes place in the .......