Week 5 Flashcards
(11 cards)
what organs are in the upper respiratory tract?
nose, pharynx
what organs are in the lower respiratory tract?
: larynx, trachea, bronchi and
lungs
cells found in the respiratory epithelium
Ciliated Columnar cells
2) Goblet cells – mucous production
3) Brush cells (chemosensory receptors) – columnar cells with blunt microvilli (very
few)
4) Small granule cells - endocrine function
5) Basal cells
function of nasal cavity
warm inspired
air via heat exchange
layers of the trachea
- Mucosa:
- Epithelium: Lined with typical respiratory
epithelium
- Lamina propria (LP) - Submucosa:
- Slightly denser CT than LP
- Seromucous glands - Musculo-cartilaginous layer:
- A series of C-shaped hyaline cartilage rings
- Trachealis muscle - Adventitia:
- Connective tissue that binds trachea to
adjacent structures
layers of the bronchi
- Mucosa:
- Epithelium: Lined with typical respiratory
epithelium
- Lamina propria (LP) + lymphatic tissue - Muscularis
- Smooth muscle and elastic fibers - Submucosa
- Slightly denser CT than LP
- Seromucous glands - Cartilaginous:
- Discontinued hyaline cartilage plates - Adventitia:
- Connective tissue that binds bronchi to
adjacent structures
what do bronchioles lack
mucosal glands and
cartilage
where are club cells found, what is their structure and function?
- found in epithelium of terminal and respiratory bronchioles
i. Secretion of surfactant, and mucin.
ii. Detoxification of xenobiotic compounds
iii. Immune defense
what cells are present in alveoli
- type I alveolar cells
- type II alveolar cells
- dust cells (alveolar machrophasges)
structure of type I alveolar cells
Make up about 95% of the
alveolar lining
* Have tight junctions that
prevent the leakage of
tissue fluid into the alveolar
air space
structure of type II alveolar cells
Synthesises and releases pulmonary surfactant
