Final answer:
The structure anterior to the esophagus and extending from the larynx to T-5 is the trachea.
Step-by-step explanation:
The structure anterior to the esophagus and extending from the larynx to T-5 is the trachea. The trachea, also known as the windpipe, is a cartilaginous tube that connects the larynx to the bronchi. It is responsible for conducting air to and from the lungs during breathing.