Answer:
Lungs: contain air sacs which help in diffusion of gases and gas exchange
Nose: is the primary organ of smell and it also contains cilia and goblet cells that excrete mucus which help stop dust and pathogens from entering the respiratory system.
Mouth: is a secoundary air-way that can replace the nose although it's not reccomended due to the lack of defence that would stop pathogens from entering
Trachea: is a pathway to the bronchi which contains goblet cells that excrete mucus that helps stop the pathogens from entering and cilia that brush the mucus up to the nose
Bronchi: are airways that are cnnected from the trachea into the lungs and branch off into smaller structures until they reach the alveoli.
Bronchioles: they are finer, smaller airways that deliver gases to the alveoli, the smooth muscle that surround the bronchioles can constrict or dilate the airway.
Alveoli: thin-walled structures that intterupt the bronchioles, their thin walls allow gas to diffuse easily.
Pharynx: to humidify air before it reaches the lungs, its thick muscle fibers and connective tissue helps attach it to its surrounding structures.
Larynx: it connects the pharynx and trachea and helps conduct ari through the respiratory tract, it contains the vocal cords which vibrate when air flows over them in which produces sound.