If the food has germs or it’s rotten
12.1 The acid in the stomach destroys microbes.
12.2 The skin prevents microbes from getting into the body.
12.3 Sticky mucus in the lungs nets microbes, and then cilia span it out of the lungs
13. D. Skin
14. False - Mucos prevents microbes in certain organs
15. False - It is a colorless fluid.
16. A. Bacteria
17. B1
8. False - Thymus in the anterior part of the chest directly behind the sternum between the lungs
19. C. Red blood cells
20. False - Bone marrow produces the known blood cells
21. True
22. False - It starts in the bone marrow.
23. True
Q. Which of these conditions is likely to worsen due to strong odors in the environment?
A. Asthma
Arteriosclerosis is a disease where the arterial walls become thickened, lose elasticity, and can restrict blood flow. It is also called hardening of the arteries and usually occurs in older adults.
