The muscular tube through which food passes from the pharynx to the stomach?

The muscular tube through which food passes from the pharynx to the stomach?

• A. Esophagus
• B. Stomach
• C. Small intestine
• D. Large intestine

Answer: (A)

Food moves from the pharynx to the stomach through a muscular tube called the esophagus. It uses coordinated peristaltic contractions—waves of muscle squeezing that propel the swallowed bolus downward. The upper portion contains skeletal muscle, allowing voluntary initiation of swallowing, while the lower portion has smooth muscle under autonomic control, coordinating the ongoing push. The esophagus travels behind the trachea in the chest, then passes through the diaphragm to reach the stomach, where the lower esophageal sphincter helps prevent reflux. The other organs listed—stomach, small intestine, and large intestine—are parts of the digestive tract that come after the esophagus, but they do not serve as the direct conduit from the pharynx to the stomach.

Food moves from the pharynx to the stomach through a muscular tube called the esophagus. It uses coordinated peristaltic contractions—waves of muscle squeezing that propel the swallowed bolus downward. The upper portion contains skeletal muscle, allowing voluntary initiation of swallowing, while the lower portion has smooth muscle under autonomic control, coordinating the ongoing push.

The esophagus travels behind the trachea in the chest, then passes through the diaphragm to reach the stomach, where the lower esophageal sphincter helps prevent reflux. The other organs listed—stomach, small intestine, and large intestine—are parts of the digestive tract that come after the esophagus, but they do not serve as the direct conduit from the pharynx to the stomach.