Pathogenic protozoa often harm the body by attacking the body's red blood cells - cells that deliver much-needed oxygen to other tissues in the body.
(Pathogenic protozoa; harm; the body; by attacking the body's red blood cells; T:often) (cells; deliver; much-needed oxygen; to other tissues in the body)
Pathogenic protozoa cells
harm deliver
the body by attacking the body's red blood cells T:often
much-needed oxygen to other tissues in the body