Respiratory Passages

Question 1

2 Organization of Respiratory System

Answer 1

Respiratory Portion – Gas Exchange
Conducting Portion – Air Conduction, Filtration, Humidification, Warming, Speech and Sense of Smell

Question 2

Types of Tissue in Respiratory System

Answer 2

Vestibule = stratified squamous non-keratinized
Nasal Cavity = respiratory epithelium
Olfactory Mucosa = pseudo-stratified epithelium
Nasopharynx/Oropharynx/Larynx = respiratory
Vocal Cords = stratified squamous non-keratinized
Trachea = respiratory epithelium

Question 3

Olfactory Bulb

Answer 3

nerve cells synapse with receptor cells in olfactory epithelium

Question 4

Olfactory Mucosa Components

Answer 4

Olfactory nerve through Cribiform plate (ethmoid bone)
Olfactory Epithelium
- basal cell
- supporting cell (secrete odourant binding protein)
- cilia of receptor cell (binds odourants)
- mucous layer (trap odourants in mucous from Bowman’s gland)

Question 5

Layers of Epithelially Lined Tubes

Answer 5

Mucosa (epithelium, lamina propia, muscularis mucosa)
Submucosa (dIRCT)
Muscularis Externa (smooth muscle)
Serosa or Adventitia (dIRCT)

Question 6

Trachea Components

Answer 6

Adventitia
Hyaline Cartilage (keeps trachea open)
Submucosa with submucosal glands
Respiratory Epithelium
Trachealis Muscle = joins hyaline cartilage

Question 7

Respiratory Epithelium Cell Types

Answer 7

Goblet Cells = produce mucosa trap particles
Basal Cells = stem cells
Ciliated Cells = cilia to remove particles
Brush Cells = sensory

Question 8

Intrapulmonary Bronchus

Answer 8

hyaline cartilage breaks into plates when enter lung
- more smooth muscle and elastic fibres
- folded mucosa for contraction
— presence of alveoli (lung tissue)
— lymphoid tissue in submucosa (BALT)