nullnullNose
Pharynx
Larynx
The upper respiratory tractNoseNoseexternal nose:
nasal cavity:
paranasal sinuses Air generally passes into the respiratory tract through the external nose (nostrils), and enters the nasal cavity
1、As the air passes through the nasal cavity, it is moistened, and filtered by the nasal mucosa.
2、It is surrounded by the paranasal sinuses in the frontal, sphenoid, ethmoid, and maxillary bonesNasal cavityNasal cavity
Vestibular region
Respiratory region
Olfactory region1.pseudostratified ciliated columnar epithelium
2.gland
3.rich blood vessels
4.Lymphoid tissue
pseudostratified ciliated columnar epithelium
olfactory gland
rich in blood vessels,1.Stratified squamous epithelium
2.Sebaceous Gland
3.VibrissaParanasal sinusesParanasal sinusessphenoidal sinusfrontal sinusmaxillary sinus openingsethmoid sinus opengingsPharynxPharynxnasopharynx
oropharynx
laryngopharynxnullnasopharynx
It contains the pharyngeal tonsils , which are collections of lymphatic tissue.
oropharynx
laryngopharynx
air enters the lower respiratory passageways by passing through the larynx and into the trachea below.
palatine tonsils
lingual tonsil
epiglottis(会厌)ConclusionConclusion
Air enters from the nasal cavities and passes through the pharynx to the larynx
Food enters the pharynx from the mouth and passes into the esophagus LarynxLarynxLaryngeal cartilages
Laryngeal muscles
Laryngeal junction
Laryngeal cavity
null1.thyroid cartilage 2.cricoid cartilage
3.arytenoid cartilageLaryngeal cartilages Thyroid cartilage is the biggest one in the laryngeal cartilages It lies below to the thyroid cartilage and attaches to trachea It lies above to the cricoid cartilageLaryngeal musclesLaryngeal musclescricothyroid muscle
posterior cricoarytenoid muscle
thyroarytenoid muscleLaryngeal junctionLaryngeal junction cricothyroid joint
median cricothyroid ligament
cricoarytenoid joint
quadrangular membranenull1.Aditus laryngis
2.Laryngeal vestibule
3.Intermedical cavity of larynx
4.Infraglottic cavity
Laryngeal cavitynullLarynx is not only corrugated hose
but also the organ of pronunciationQuestionQuestionwhat is the upper respiratory tract's component?Thank you for attendingThank you for attending