What is the body's ability to resist or combat infections, diseases, and foreign substances called?
Which organ produces B-cells and T-cells?
Which organ is responsible for T-cell maturation?
Which organ filters blood and fights blood infections?
Which of the following is the largest organ of the body?
Which cells are responsible for phagocytosis?
Which cells release histamine during allergic reactions?
Which cells produce antibodies?
What is the first line of defence?
What is a severe, life-threatening allergic reaction called?
