Histo Lec: M15 - Respiratory System Flashcards
consists of the nasal cavity, trachea, bronchi, and bronchioles.
Conducting Portion
Conducting Portion’s luminal surfaces
ciliated pseudostratified columnar epithelium and contain goblet cells
Portion composed of millions of alveoli
Gas-Exchange Portion
Gas exchange portion is lined by
extremely thin, simple squamous epithelium
flattened cells that create a very thin diffusion barrier for gases
Type I pneumocytes
secrete surfactant, which decreases the surface area between thin alveolar walls, and stops alveoli from collapsing during exhalation
Type II pneumocytes
as the primary mode of entry of air into the airway, has both respiratory and olfactory functions
Nasal cavity
Nasal vestibule is lined by
keratinized stratified squamous epithelium
produce serous secretions that dissolve odiferous particles so that they can interact with the olfactory cilia
Bowman’s glands/Olfactory glands
is a cartilaginous structure located cranial to the larynx
Epiglottis
Pseudostratified columnar ciliated epithelium with seromucous glands in its lamina propria continues in to the larynx and covers the false vocal fold and the end of the laryngeal ventricle.
Larynx
is attached to the cricoid cartilage of the larynx by the cricothyroid membrane and lies anterior and adjacent to the esophagus
Trachea
trachea bifurcates at the _____ form a left and a right primary bronchus
carina
tertiary bronchi continue to divide into smaller tubular structures called
terminal bronchioles
These non-ciliated cuboidal cells contribute to the production of surfactant
exocrine bronchiolar cells or club cells
marks the transition point from the conducting to the respiratory portion of the respiratory system
Respiratory bronchioles
A marked feature of the respiratory portion of the airway is gaseous exchange
Alveoli
The nostrils of the bird, which lead into the nasal cavity, may have a flap of horn to protect them called.
Operculum
T/F: Birds do not have a pleural cavity as the lungs do not expand.
True
T/F: Birds has a diaphragm, and their thoracic and abdominal cavities are not continuous
Birds lack a diaphragm, and their thoracic and abdominal cavities are continuous
9 air sacs of birds
Cervical (2)
Clavicular
Cranial Thoracic (2)
Caudal Thoracic (2)
Abdominal (2)
