In jumans oxygen enters the body and carbon dioxide leaves it through the lungs. the lungs are made of thousands of tiny air sacs surrounded by blood vessels. how does this the teo gases to diffuse quickly into and out of the blood?

Energy needs, in total kilocalories per day, are greater during than any other time of life. a. childhood b. infancy c. adulthood d. adolescence

Which of these is likely to be the best source of valid health information?

Which of the following are considered general purposes of performing pulmonary function tests (pfts)? 1. the functional status of the lungs 2. the diffusion characteristics of the alveolar-capillary membrane 3. how much and how fast gas can be moved into and out of the lungs 4. the specific diagnosis of pulmonary disease