Upper and lower respiratory tract
Clinical classification
Paranasal sinuses
Upper and lower respiratory tract
Anatomical classification
External nose:
Bone and cartilage
Tip of the nose skin
Ala of the nose
Nasal Cavity :
Medial wall
Lateral wall
Choncae
Meatus
Roof :Ethmoid bone
Floor: Palate
Medial wall: Nasal septum
Lateral wall: Conchae
Opens in inferior meatus
Function of paranasal sinuses:
Lighten the weight of the skull
Add resonance to the voice
Insulator against cold air
Transnasal hypophysectomy
Nasopharynx contains :
1) Adenoids: Lymphoid tissue aggregation
2) Opening of Eustachian tube
Oropharynx contains :
1) Palatine tonsils
2) Lingual tonsils
Laryngeopharynx behind larynx
Epiglottis
Larynx
The Larynx is a cartilaginous box in the neck :
1) Respiration passage
2) Role in voice production
3) Closed during deglutition
Extends from C4---C6 vertebrae
Larynx
Epiglottis
Thyroid
Cricoid
Larynx
Laryngeal muscles:
1) Opening of the laryngeal inlet during respiration
2) Closing it during deglutition
3) Changing the tone of the vocal cords
Trachea
Length 11cm
Width 2.5 cm
C6---T4
Trachea
15—20 c shaped tracheal cartilages
Trachea
Trachea
Oesophagus is posterior to trachea
Main Bronchii
Shorter
Wider
More Horizontal
Narrower
Longer
More oblique
Lungs
Pleura