Immune System Crossword

6. a lymphocyte able to bind to certain tumor cells and virus-infected cells without the stimulation of antigens, and kill them by the insertion of granules containing perforin
8. a colorless cell that circulates in the blood and body fluids and is involved in counteracting foreign substances and disease; a white blood cell
9. a lymphoid organ situated in the neck of vertebrates that produces T cells for the immune system
11. the thin layer of tissue forming the natural outer covering of the body of a person or animal
13. the stomach or belly
14. an abdominal organ involved in the production and removal of blood cells in most vertebrates and forming part of the immune system
18. A small bean-shaped structure that is part of the body's immune system
20. part of the body's immune system. They help the body fight infection and other diseases

1. A special type of immune cell that is found in tissues and boosts immune responses by showing antigens on its surface to other cells of the immune system
2. a large phagocytic cell found in stationary form in the tissues or as a mobile white blood cell, especially at sites of infection
3. A Body System That Fights Diseases
4. A type of white blood cell that makes antibodies
5. a basophilic white blood cell
7. an epithelial tissue which secretes mucus, and lines many body cavities and tubular organs including the gut and respiratory passages
10. The soft, spongy tissue that has many blood vessels and is found in the center of most bones
12. a neutrophilic white blood cell
15. a white blood cell containing granules that are readily stained by eosin
16. a small colorless disk-shaped cell fragment without a nucleus, found in large numbers in blood and involved in clotting
17. cells with the potential to develop into many different types of cells in the body
19. help protect the body from infection and may help fight cancer