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.
Organs. The chest is the area of origin for many of the bodyâs systems as it houses organs such as the heart, esophagus, trachea, lungs, and thoracic diaphragm.The circulatory system does most of its work inside the chest.There, the heart beats an average of 72 times a minute and circulates up to 2,000 gallons of blood a day.he chest is the area of origin for many of the bodyâs systems as it houses organs such as the heart, esophagus, trachea, lungs, and thoracic diaphragm. The circulatory system does most of its work inside the chest. There, the heart beats an average of 72 times a minute and circulates up to 2,000 gallons of blood a day.