Trachea is also known as the wind pipe. The function of trachea is to transport air from larynx to bronchi. It is about 4 inches long situated between the larynx and the main bronchi i.e. from just below the Adam’s apple, passing behind the notch of the sternum to behind the angle of the sternum. The trachea further divides into two bronchi one for each lung. The trachea contains numerous rings of hyaline cartilage which are C-shaped being dorsally incomplete, connected to each other by elastic connective tissue. The ends of the incomplete rings are joined by smooth trachealis muscle.