Please helpp! Easy 10 points

In a two to three page paper, examine the history and development of the healthy people initiatives. discuss some of the successes and shortfalls of the three initiatives thus far; including healthy people 2000, healthy people 2010, and healthy people 2020. be sure to include statistical data from the initiatives to support your position. don't forget to cite your sources.

Which of the following is the definition of ventilation as it relates to the respiratory system?

In this model, what do p, s, and a bases represent?