1. what is the name for the central region of the chest cavity that contains the organs between the lungs? a)pleura b) pharynx c)mediastinum d)epiglottis 2.air from the nasal cavity enters the superior portion of the pharynx called the a) tracheopharynx. b)oropharynx. c)nasopharynx. d)laryngopharynx. 3.compared to an adult, a newborn breathes a)twice as often. b)a quarter as often. c)four times as often. d)half as often. 4.when blood leaves the lungs it is a)rich in carbon dioxide. b)oxygenated. c)exchanging gases. d)deoxygenated. 5.the cluster of air sacs at the end of each bronchiole is called a)alveoli. b)trachea. c)bronchi. d)bronchus. 6.respiration eliminates excess from the body. a)carbon dioxide b)alveoli c)oxygen d)pleura 7.the flap of elastic cartilage that protects food from entering the larynx is called the a)epiglottis. b)larynx. c)glottis. d)esophagus. 8.when the gas exchanges are being made between the blood and the body exterior, it is called a)expiration. b)internal respiration. c)external respiration. d)pulmonary ventilation. 9.air moving in and out of the lungs is called a)internal respiration. b)external respiration. c)inspiration. d)pulmonary ventilation. 10.following the removal of the larynx, a person would be unable to a)breathe. b)sneeze. c)eat. d)speak.