Conducting Portion of the respiratory track

includes

the nose

 nasal cavity

 pharynx

 larynx

 trachea

 primary bronchi to the terminal bronchioles

nose

nasal cavity

paranasal sinuses

pharynx

Part of the conducting system

frontal bone

nasal bones

cribriform plate of the ethmoid

sphenoid bone

palatine process of the maxillae

horizontal plate of the palatine bone

frontal, ethmoidal, sphenoida, and maxillary sinuses

nasopharynx

oropharynx

laryngopharynx

paired auditory openings on the lateral wall and a pharyngeal tonsil on the posterior wall

conducts air

lined with pseudostratified ciliated columnar epithelium

paired palatine tonsils on the lateral walls and lingual tonsils at the base of the tongue

Conducts air, serves as passageway for food and drink

lined nonkeratinized stratified squamous epithelium

conducts air into the trachea and lower respiratory tract, and produces sound

composed of cartilage and has paired vocal folds that produce sound when air passes between them

Primary bronchi

Secondary bronchi

Tertiary bronchi

Bronchioles

Terminal bronchioles

is a small thin sac with alveolar type I cell - squamous alveolar cell -  promotes rapid gas diffusion across the aleolar wall

and

alveolar type II cell - septal cell secrete pulmonary surfactant that coats the inner alveolar surface to reduce surface tension and prevent the collapse of the alveoli

alveolar type I cells

endothelial cell of a capillary

fused basement membranes

bronchi

pulmonary vessels

lypmh vessels

and nerves

The horizontal fissure - seperates the superior from the middle lobe

oblique Fissure - seperates the middle from the inferior lobe

Scalene

external intercostal

serratus posterior superior (for forced exhalation)

internal intercostal

transversus thoracis

serratus posterior inferior

bleeding from the nose; may be caused by allergies, hypertension, infection, or nasal trauma. 

Also called nosebleed or nasal hemorrhage