An injection of a concentrated salt solution into the circulatory system would result in

An injection of a concentrated salt solution into the circulatory system would result in crenation of the red blood cells.
Crenation is a feature of red blood cells. A normal human red blood cells are round, with an indented center, crenation of red blood cells happens as the result of the process of Osmosis. After that the shape of red blood cells shrink, have notched appearance.

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