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2
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a soft-bodied beetle related to the glowworm which has luminescent organs.
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4
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the respiratory organ of fishes and some amphibians
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8
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process in which cells use oxygen from the air and sugar in the food we eat to produce energy, carbon dioxide and water vapour
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10
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a flexible cordlike structure containing blood vessels and attaching a human fetus to the placenta during pregnancy.
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11
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disease caused by enlargement of air sacs in the lungs
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12
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enlargement or swelling
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15
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reacts with unnecessary force
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16
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breathed out (the word has the letter h)
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18
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a large eel-like freshwater fish which using pulses of electricity to kill prey or for defence.
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20
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infectious and inflammatory lung disease that results in lung damage
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22
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disease in which air tubes become inflamed and filled with mucus due to an allergy
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23
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breathed in (the word has the letter h)
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24
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breathing with difficulty
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25
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breathed out (the word has the letter p)
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