Here's why:
* Passageway for food: The pharynx is the muscular tube that connects the mouth to the esophagus. It's the pathway through which food travels from the mouth to the rest of the digestive tract.
* Initiates swallowing: When you swallow, the pharynx contracts and pushes the food bolus down the esophagus. This process is essential for moving food along the digestive system.
* Crossroads for food and air: The pharynx also serves as a passageway for air during breathing. This is why the epiglottis acts as a "flap" to prevent food from entering the trachea (windpipe).
* Shared system: While the pharynx has a vital role in breathing, its involvement in the swallowing process makes it an integral part of the digestive system.
Therefore, even though the pharynx doesn't directly break down food, its function as a crucial conduit for food transport earns it a place in the digestive system.