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The gas that is carried away back to the heart is called _________.
carbon dioxide
The liquid part of blood that dissolves proteins, sugars, and nutrients is the ______.
plasma
The part of blood that carries oxygen to all parts of the body is the ______.
red blood cell
The part of blood that helps fight disease and infection is the ______.
white blood cell
The part of blood that has a concave shape and is able to squeeze through capillaries is the ______.
red blood cell
Small fragments of a blood cell that help form blood clots are the ______.
platelets
