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Для чего рыбам необходимы секреты, выделяемые кожными железами?

бог20031 бог20031    2   17.04.2019 02:50    1

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rickieee rickieee  17.04.2019 02:50
В коже рыб располагаются различные железы: ядоотделительные, слизеотделительные и другие. Выделяемая слизь способствует уменьшению трения и быстрому движению в воде
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