1. As food moves down your esophagus, your esophagus bulges. Why doesn’t this cause the trachea, which lies adjacent to it, to become closed off? 2. Is breathing a voluntary or involuntary action? 3....

1. As food moves down your esophagus, your esophagus bulges. Why doesn’t this cause the trachea, which lies adjacent to it, to become closed off?

2. Is breathing a voluntary or involuntary action?

3. Having the openings to both the trachea and the esophagus in the pharynx is problematic because it can lead to choking. Are there any advantages to this arrangement?