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Respiratory System + Diseases - Coggle Diagram
Respiratory System + Diseases
Respiratory system
Allows passage of air from nose/mouth to alveoli
Conducting portion
Upper
Nasal cavity
Pharynx
Larynx
Lower
Trachea
Bronchi
Bronchioles
Terminal bronchioles
Respiratory portion
Respiratory bronchioles
Alveolar ducts
Alveoli
Nasal cavity
3 histological regions
Vestibule
Stratified squamous epithelium
Associated with sebaceous glands + short firm hairs - vibrissae
Glands + vibrissae trap large particulate material in inspired air
Olfactory
Secretion of olfactory glands trap + dissolve odoriferous particles
Bowman's glands
Serous fluid that bathes olfactory cilia
Olfactory epithelium
Tall, pseudostratified columnar epithelium
3 diff cell types
Supportive
Basal
Neuroepithelial olfactory cells
Respiratory
Bone projections - shelves/turbinates - increase SA covered by respiratory mucosa + improve quality of inspired air
Respiratory epithelium
Pseudostratified columnar epithelium
Distinct cilia
Many goblet cells
In allergic reaction + viral infection
Blood vessels engorge + become leaky
Distention of LP - difficulty breathing
Nasal congestion
Larynx
Tubular region between pharynx + trachea
Skeletal framework consists of plates of hyaline cartilage
Functions
Air conduction
Phonation
Vestibular folds
False vocal cord
Lined by respiratory epithelium (RE)
Loose connective tissue lamina propria containing glands + lymphoid tissue
Helps in resonance
Vocal folds
True vocal cords
Lined by stratified squamous non-keratinised epithelium (SSNK)
Lamina propria
Superficial layer is LCT (Reinke's space)
Deeper layer is vocal ligament
Band of elastic fibres