What are the functions and importance of immune system?

How does the immune system protect the body from infections and disease?

What function do receptors play in specific immune responses andhow can they be made to vary so widely?

What is the study of the immune system called

How does the human immune System Function:

31. What are the shape of lymph nodes? 32. What is another name for innate immunity. 33. What do antigens do for the immune system? 34. What are the three stages of 35. How is the body affected by stress? 36. What is pulmonary ventilation? 37. Where does pulmonary ventilation take place?

42. How does the Immune System interact with the Circulatory System? 43. In what ways does the hierarchy of life connect with Body Systems?

Why does the body have both antibody and cell-mediated immune responses?

What are the disorders of the immune system?