Which part of the digestive system is shared with the respiratory system?

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Multiple Choice

Which part of the digestive system is shared with the respiratory system?

The main idea here is that some structures serve as a common passage for both air and food. The pharynx, or throat, is shared by the digestive and respiratory systems. It receives air from the nasal or oral cavities and funnels it toward the larynx for breathing, while also guiding swallowed food from the mouth to the esophagus. During swallowing, the epiglottis tips to cover the airway opening so food doesn’t enter the airway, and the bolus moves into the esophagus behind the pharynx. The other options are parts of the digestive tract alone: the esophagus transports food to the stomach, and the stomach and small intestine carry out digestion and absorption. They aren’t involved in conducting air, which is why they aren’t shared with the respiratory system.

The main idea here is that some structures serve as a common passage for both air and food. The pharynx, or throat, is shared by the digestive and respiratory systems. It receives air from the nasal or oral cavities and funnels it toward the larynx for breathing, while also guiding swallowed food from the mouth to the esophagus. During swallowing, the epiglottis tips to cover the airway opening so food doesn’t enter the airway, and the bolus moves into the esophagus behind the pharynx.

The other options are parts of the digestive tract alone: the esophagus transports food to the stomach, and the stomach and small intestine carry out digestion and absorption. They aren’t involved in conducting air, which is why they aren’t shared with the respiratory system.

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