The Immune System

5. Cellular fragments that circulate in the blood and release clotting factors when there is a cut
6. Chemicals that trigger a response by the immune system
7. When an antigen is sensed these products of lymphocytes attack and kill the foreign pathogen
8. Antibiotics are ________ which allows them to attack harmful bacteria in the body while not harming the host
9. An antibacterial enzyme in mucus that give it antiseptic properties
10. Glands that secrete the chemical sebum
13. The enzyme converts fibrinogen, a soluble protein, into fibrin
14. Pathogens that survive inside the body and invade it but can survive outside
16. A biological agent that causes disease or illness to its host
18. The outcome of a build up of mutated bacteria that aren’t affected by antibiotics
21. The process of going into a cell through a vacuole
22. A blood clot is called a _______; coronary thrombosis are blood clots in the coronary arteries
23. Immunity When cells attack only the pathogens they are triggered by

1. When cells attack all pathogens
2. A virus that invades and destroys helper T-cells and leads to the progressive decrease in antibody production
3. These blood cells take in pathogens and then use enzymes from lysosomes to digest the pathogen
4. Florey and Chain’s experiments to test ______ on bacterial infections in mice
11. The first line of defense the body has against pathogens
12. White blood cells that create antibodies
15. Pathogens that are only able to survive inside the human body
17. Blood flowing from the severed vessel transforms from a liquid to a semi-solid gel to seal the wound and prevent further loss of blood/blood-pressure
19. They cannot be treated using antibiotics because they lack a metabolism
20. This enzyme forms a mesh within the cut to trap platelets and blood cells