Hasharotlarning qon aylanish sistemasi qanday vazifani bajaradi?
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organizmni qon va kislorod bilan ta’minlash
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organizmni faqat kislorod bilan ta’minlash
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kislorod va karbonat angidridni tashib berish
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butun tanani oziq moddalar bilan ta’minlash va parchalansih mahsulotlarini ayirish organlariga olib borish
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tana haroratini bir xil bo’lishini ta’minlash
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