What structure allows air to and from the lungs?
A) Trachea
B) Epiglottis
C) Esophageal sphincter
D) Chyme
E) Pyloric sphincter

Question

What structure allows air to and from the lungs? 
A) Trachea 
B) Epiglottis 
C) Esophageal sphincter 
D) Chyme 
E) Pyloric sphincter

Quizplus · Accepted Answer

The trachea, also known as the windpipe, is the structure that allows air to pass to and from the lungs. It connects the larynx to the bronchi. The epiglottis is a flap of tissue that covers the trachea during swallowing to prevent food from entering the airway. The esophageal sphincter and pyloric sphincter are found in the digestive system and control the flow of food in the esophagus and stomach, respectively. Chyme is the mixture of partially digested food and stomach acid that enters the small intestine.

What Structure Allows Air to and from the Lungs