上呼吸道

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