Immunity

2. Diseases caused by pathogens
4. They are in the thoracic cavity surrounded by the pleural membranes
6. The wall contains elastic fibers which stretch during inspiration and recoil during expiration
8. Each B-cell has the ability to make one type of antibody
11. They remove dead cells and invasive microorganisms
14. When a pathogen invade the body, the cells under attacking release chemicals to send a sign of help.
15. Larger than neutrophils
17. thicells remain circulating in the blood for a longtime

1. produce antibodies
3. Drug that kills or stops the growth of bacteria,whithout harming the cells of the infected organism
5. Mature T cells have specific cell surface receptor called T cell receptors
7. Important role in the immune system Smaller than phagocytes has Two types
9. is a cartilaginous tube that connects the larynx to the bronchi of the lungs, allowing the passage of air, and so is present in almost all air-breathing animals with lungs.
10. Maximize the surface area for diffusion of oxygen and carbon dioxide between blood and atmosphere
12. are the smaller branches of the bronchial airways in the respiratory tract.
13. are air passages of the lungs
16. They can combine with virus or toxins to prevent to go inside the cell