Defense against disease - planning 6.3
Planning sheet for defense against disease Understanding(s): Blood clotting and heart disease Immune System Antigens and antibodies HIV and AIDS Essential Question(s) How can the proteins on the surface of cells, called antigens, help the body's immune system to identify pathogens? How does blood clot? What have blood clots got to do with heart attacks? How can the proteins on the surface of cells, called antigens,...