Respiratory System- Lecture 10/19/21 Flashcards
Conducting epithelium
AKA respiratory epithelium, pseudostratified, ciliated, columnar epithelium with goblet cells
Location of conducting epithelium
-Nasal cavity
-Larynx, trachea
-Bronchi
-intrapulmonary bronchi
(Progression to non-ciliated, cuboidal epithelium)
Non-motive cilia
Located in olfactory epithelium, important in smell
Supporting cell
In olfactory epithelia, high nucleus
Bipolar neuron
- Olfactory cell, responsible for smell
Bowmans gland
Secretes fluid that covers the olfactory epithelia
Kulchitsky cells
Enteroendocrine cells that exist in respiratory epithelium, secretes Catecholamine, serotonin, calcitonin etc
Trachealis muscle
Contracts when we cough, also allows esophagus to expand during peristalsis
C-shape hyaline cartilage
Diagnostic of trachea
Tracheal glands
Seromucous submucosal glands (NO muscularis mucosae
Intrapulmonary bronchi
Have discontinuous hyaline cartilage
BALT
Bronchi associated lymphoid tissue
Bronchiole
No mucosal glands, no cartilage, many club cells
Club cells
Non-ciliated, produce surfactant, protect against inflammation and oxidative stress
Terminal bronchiole
Bronchiole with respiratory bronchioles directly downstream
Alveoli
Where gas exchange happens
Surfactant
Dipalmitoylphosphatidylcholine (DPPC)
Coats aveolar surface to prevent collapse
Type 1 pneumocystis
Long cytoplasm, facilitates gas exchange
Type II pneumocyte
Secretes surfactant in response to signals, serve as progenitors for type I pneumocyte
Pulmonary artery
Oxygen poor blood, shares an adventitia with bronchiole
Pulmonary vein
Oxygen rich blood, travels through the alveoli
