Why can't people eat in their lungs? Please answer in detail! ! !

Trachea and feeding tube are two paths. The joint outside the throat that seems to move up and down is epiglottic cartilage. When eating and drinking water, epiglottic cartilage can cover the trachea, only let the esophagus open, and the meal naturally enters the esophagus. If you talk while eating, epiglottic cartilage will not cover the esophagus, and rice and water will be swallowed into the trachea by mistake-choking. At this time, the instinctive reaction of the body is to cough violently until the foreign body coughs out from the trachea (the trachea only accepts air, and other mistakes are definitely not allowed, which is the self-protection of the body).

Trachea-bronchus-lung, from top to bottom. The trachea intercepts foreign bodies before they fall into the lungs.