Final answer:
The anterior borders of the trachea include the thyroid cartilage of the larynx and the thyroid gland, with the laryngeal prominence, or Adam's apple, being a notable feature.
Step-by-step explanation:
The anterior borders of the trachea include the thyroid cartilage of the larynx, specifically the laryngeal prominence, known as the "Adam's apple," where the two laminae of the thyroid cartilage join at the front of the neck. The thyroid gland is also located anterior to the trachea, draped over its front surface with its isthmus lying on the second and third tracheal rings. Although the parathyroid glands are associated with the thyroid gland, they are located on the posterior surface of the thyroid and do not form part of the anterior border of the trachea.