Final answer:
The Esophagus is not one of the six connected elements of the respiratory tract.
Step-by-step explanation:
The structure that is NOT one of the six connected elements of the respiratory tract is the Esophagus. The six connected elements of the respiratory tract are:
a. Trachea
b. Larynx
c. Bronchioles
d. Esophagus
The respiratory tract is responsible for the passage of air into and out of the lungs, and the esophagus is the structure that carries food from the mouth to the stomach, not involved in respiration.