A) 1 month; 4 years B) 6 months; 3 years C) 1 year; 4 years D) 18 months; 3 years Answer: C Topic: Business Cycle Patterns Skill: Recognition 4) According to the National Bureau of Economic Research, since 1920 the average length of reces-sions has been approximately A) one year. B) a year and a half.C) two years.) 1 month; 4 years B) 6 months; 3 years C) 1 year; 4 years D) 18 months; 3 years Answer: C Topic: Business Cycle Patterns Skill: Recognition 4) According to the National Bureau of Economic Research, since 1920 the average length of reces-sions has been approximately A) one year. B) a year and a half. C) two years.
Lungs and Respiratory System of the Chest The respiratory system of the upper abdomen and chest includes the structures involved in the vital delivery of atmospheric air and the exchange of gases between the body and atmospheric air.
Your lungs are a pair of large organs in your chest and are part of your respiratory system. When you breathe, air enters your body through your nose or mouth.It next passes through your windpipe (trachea) and through each bronchus, and finally goes into your lungs. When you breathe in, your lungs expand with air.our lungs are a pair of large organs in your chest and are part of your respiratory system. When you breathe, air enters your body through your nose or mouth.