Epiglottis- The epiglottis is a small, moveable “lid” that protects your windpipe from food and drink. It is located directly above the larynx. The epiglottis is coated by a comparable respiratory epithelium; however, the lingual surface is lined by stratified squamous epithelium.

Trachea- The trachea is the primary pathway for air to travel from the upper respiratory tract to the lungs. During inhalations, the air is drawn into the trachea, where it is warmed and moisturized before entering the lungs. A moist tissue called mucosa lines each ring of tracheal cartilage.

Alveoli- The alveoli act in breathing in and out, the alveoli are where the lungs and blood exchange oxygen and carbon dioxide. Breathing in oxygen from the air flows through the alveoli and into the bloodstream, where it travels to all of the body’s tissues.

Sources:
https://my.clevelandclinic.org/health/articles/21205-respiratory-system
https://byjus.com/questions/what-is-the-function-of-the-trachea/
https://emedicine.medscape.com/article/1949369-overview
https://www.cancer.gov/publications/dictionaries/cancer-terms/def/alveoli