There are many organs in the respiratory system which include lungs, nose, mouth, trachea, bronchi, bronchioles, alveoli, pharynx, and larynx. How does the structure of each of these help its function?

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.