respiratory sir dale 3rd year

Nose, nasal cavity, paranasal sinuses, pharynx, and larynx.

Upper Respiratory Tract

Trachea, bronchial tree, and lungs

Lower Respiratory Tract

Conducting Zone

System of interconnecting tubes and cavities that filter, warm, humidify, and conduct air into the lungs. Includes the nose, pharynx, larynx, trachea, bronchi, and non-respiratory bronchioles

Respiratory Zone

Sites where actual gas exchange occurs. Includes respiratory bronchioles, alveolar ducts, alveolar sacs, and alveoli.

mouth/nose

filtered, humidified, warmed

mucous

traps bacteria and foreign object

cilia

sweeps mucus towards throat → digested by stomach

pharynx

passage for food/air (throat)

tonsils

cluster of lymphatic tissues

larynx

contains vocal cords

epiglottis

covers larynx when liquids/food swallowed

trachea

windpipe; lined with cartilage (c-shape)

bronchi

branches to lungs

bronchioles

smaller branches

lungs → alveoli

air sac for gas exchange

external nose (nose) external nose (nasal cavities)

2 portion of the nose

septal cartilage
lateral cartilage
alar cartilage

cartilages of nose