The Immune System

3. Pathogens that are only able to survive inside the human body
6. These blood cells take in pathogens and then use enzymes from lysosomes to digest the pathogen
8. 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
9. The outcome of a build up of mutated bacteria that aren’t affected by antibiotics
10. This enzyme forms a mesh within the cut to trap platelets and blood cells
11. When an antigen is sensed these products of lymphocytes attack and kill the foreign pathogen
12. The first line of defense the body has against pathogens
13. Florey and Chain’s experiments to test ______ on bacterial infections in mice
14. When cells attack all pathogens
15. Pathogens that survive inside the body and invade it but can survive outside
17. Antibiotics are ________ which allows them to attack harmful bacteria in the body while not harming the host
18. They cannot be treated using antibiotics because they lack a metabolism
19. A blood clot is called a _______; coronary thrombosis are blood clots in the coronary arteries
20. The enzyme converts fibrinogen, a soluble protein, into fibrin
22. White blood cells that create antibodies

1. The process of going into a cell through a vacuole
2. Chemicals that trigger a response by the immune system
4. Glands that secrete the chemical sebum
5. A virus that invades and destroys helper T-cells and leads to the progressive decrease in antibody production
6. A biological agent that causes disease or illness to its host
7. Immunity When cells attack only the pathogens they are triggered by
16. Cellular fragments that circulate in the blood and release clotting factors when there is a cut
21. An antibacterial enzyme in mucus that give it antiseptic properties