Which structure is the site where gases are exchanged?
bronchi
cilia
alveoli
cavities

Which of the following must be treated under the care of a physician and is mainly considered a medical condition? a. scoliosis b. lordosis c. kyphosis d. all of the above

Which of the following is the best description of health protecion the answer is b the direct actions taken by health organizations to improve public health

What is a negative influence on community health? a: national health debt b: citizens who drive unsafely c: unreliable public transportation d: stores that sell tobacco to minors