Which body system is primarily responsible for protecting against foreign substances and disease-causing organisms?

The answer is immune system. The immune system is the body's protection against infectious organisms and other attackers. Through a series of steps called the immune response, the immune system attacks organisms and substances that invade body systems and cause disease.

answer;

-phase iii

explanation;

phase three begins with the transition of a recovered individual to a phase three team of the appropriate service. this phase usually takes place at a military medical facility in the united states. one of the goals of phase three is family reunification.