Question

which one is not a cell of the immune system a)b cells b) t cells c)red blood cells d)white blood cells

Answer 1

All cells are Pathogens so the correct answer is Red Blood Cells, because red blood cells are erythrocytes which flows a different way like delivering oxygen to the body tissues yard why it isn't part of the immune system, so the answer is C.

Answer 2

All the Cells in the immune system: T-cells, B-cells and NK Cells these are all types of white blood cells. so the answer is C