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Jan
20
comment Which blood vessel carries the most impure blood?
please read the question again and make necessary changes in the answer. I have revised the question in order to include more details.
Jan
20
comment Which blood vessel carries the most impure blood?
@AlanBoyd Impurities include urea uric acid and other components which are there in urine.
Sep
30
comment Why do grapes not shrink when placed in strong sugar solution?
please see the question now .... I have added some more information and then help me!