HISTOLOGY OF RESPIRATORY TRACT
SLO1 : Describe microscopic structures of nasal mucosa
Characteristics of NASAL MUCOSA
OLFACTORY
PARANASAL SINUSES (maxillary sinus)
NASOPHARYNX
NASAL CAVITY
PSEUDOSTRATIFIED COLUMNAR CILIATED EPITHELIUM
Has goblet cells
secrete mucus
to trap particles --> cilia cell in pharynx swallowed --> destroyed by gastric acid
Supported by:-
blood vessel
serous glands
lamina propria
mucous glands
function of glands :-
for T & humidified
OLFACTORY EPITHELIUM
OLFACTORY MUCOSA
PSEUDOSTRATIFIED COLUMNAR EPITHELIUM
TYPE OF CELLS :-
SUPPORTING CELLS
BASAL CELLS
OLFACTORY CELLS
Has olfactory glands of bowman
Has BOWMAN'S GLAND
To produce constant flow of fluid surrounding olfactory cilia
Facilitating access of new odoriferous substances
REGIONS :-
VESTIBULE
RESPIRATORY SEGMENT
OLFACTORY MUSCLE
NON KERATINIZED STRATIFIED SQUAMOUS EPITHELIUM
SLO2 : Describe the microscopic structure of larynx
FOLDS
UPPER FOLD
LOWER FOLD
COLUMNAR CILIATED EPITHELIUM
HAS SEROMUCOUS GLANDS
= FALSE VOCAL CORD
= TRUE VOCAL CORD
STRATIFIED SQUAMOUS EPITHELIUM
FX of vocalis : for movement --- to control PITCH
VOCALIS MUSCLE
VOCALIS LIGAMENT
Between :- has narrow cleft
Lined by : COLUMNAR EPITHELIUM
Contains SEROMUCOUS GLANDS
SLO3 : Describe the microscopic features of trachea
LAYERS
RE
LP
S
FT
SLO4 : Describe the microsopic structure of bronchial tree
BRONCHUS
BRONCHIOLE
TERMINAL BRONCHIOLES
RESPIRATORY BRONCHIOLES
PSEUDOSTRATIFIED RESPIRATORY EPITHELIUM
Presence of :-
SUPPORTING CARTILAGE
SMOOTH MUSCLE
GLANDS
Between lamina propria & submucosa
Increase down the tract
Smallest diameter passages of conducting portion of respiratory tree
CLARA CELLS
CHARACTERISTICS
FUNCTION
DOME SHAPED
NON CILIATED
Produce components of SURFACTANT
Act as STEM CELLS
Contain enzyme systems