What is the nerve supply of trachea?

The trachea is primarily innervated by the vagus nerve (cranial nerve X), which provides parasympathetic fibers that regulate secretions and bronchoconstriction. Additionally, sympathetic innervation comes from the sympathetic trunk, which helps to modulate blood flow and bronchial dilation. Sensory innervation is primarily through the recurrent laryngeal nerve, a branch of the vagus, which conveys sensation from the mucosal lining of the trachea.