The Lymphatic System

2. organ part of the lymphatic system
5. clear fluid from blood plasma
6. butterfly-shaped gland found in the base of the neck
8. A condition in which the body's immune system mistakes its own healthy tissues as foreign and attacks them.
9. type of white blood cell that is an important part of the immune system and helps the body fight infection.
10. a protein produced by the body's immune system when it detects harmful substances, called antigens
14. any molecule or chemical group of an organism which acts as an antigen in inducing antibody formation in another organism
16. A type of white blood cell that surrounds and kills microorganisms
17. group of nearly 60 proteins that are in blood plasma or on the surface of some cells.
18. a type of white blood cell and a type of granulocyte.
19. soft tissue masses found in the back of the throat
20. a fever-producing substance

1. originate from outside the body
3. small bean-shaped structure that is part of the immune system
4. network of capillaries
7. A type of immune cell that has granules with enzymes that can kill tumor cells or cells infected with a virus
11. A type of white blood cell
12. A type of immune cell that has granules with enzymes that are released during allergic reactions and asthma.
13. naturally occurring substance that interferes with the ability of viruses to reproduce.
15. A type of white blood cell that makes antibodies