An eosinophil is a white blood cell involved in controlling infections. the white blood cell is a part of the system, while the red blood cells are part of the system.

a immune, circulatory
b circulatory, respiratory
c immune, respiratory
d circulatory, immune

Consider the phase change taking place in the picture. you could use all but one statement to describe what is happening here. that is: a) temperature is increasing. b) kinetic energy is increasing. c) the space between the particles remains the same. d) the attractive force between the particles is decreasing.