ACROSS 4. PASE
9. GMS
10. acid alcohol
14. aldehyde fuchsin
15. bacteria
16. kinyoun
18. black fungus
19. alkaline buffer in GMS stain
21. counterstain
22. best water
23. Sodium thiosulfate
Down
1. most specific for afb
2. fast green
3. single-celled microorganism
5. one group
6. abstain
7. AFB
8. cell capsule
11. acid fast stain
12. composed of DNA and RNA
13. fungi
17. Strong oxidizer
20. yeast

The alveoli are what give the lungs so much space, and if they are big, there is more gas exchange than if they are small.

The answer you're looking for is washing your hands. "at this late date, we all expect our doctors to wash their hands before examining us or performing an operation in order to prevent the spread of infection. surprisingly, physicians did not begin to acknowledge the lifesaving power of this simple act until 1847.it was then that dr. semmelweis began exhorting his fellow physicians at the famed vienna general hospital (allgemeines krankenhaus) to wash up before examining women about to deliver babies. his plea was far more than aesthetic; it was a matter of life and death and to prevent a deadly malady known as “childbed” or puerperal (from the latin words for child and parent) fever."