Histo Lab 2 Flashcards
What type of epithelium is in the mammalian trachea
Pseudostratified ciliated columnar
Are there submucosal glands in mammalian trachea
Only in large animals
Differences between avian and mammalian trachea
Avian has 2 layers of complete cartilage ring
Avian has submucosal glands (saccular)
What is distinct in bronchus vs bronchioles
Bronchus has cartilage plates and bronchioles lack cartilage
In smaller bronchi what disappears
Glands disappear in smaller bronchi and cartilage is decreased
Primary and secondary bronchioles epithelium
Ciliated columnar
Terminal and respiratory bronchioles epithelium
Cuboidal, rarely ciliated
Alveolar ducts connect what 2 structures
Alveolar ducts connect respiratory bronchioles to alveolar sacs
Components of avian lungs (6)
Trachea, primary and secondary bronchioles, parabronchi, atria, air capillaries, air sacs
What participates in gas exchange in avians
Parabronchi NOT air sacs
When the bird exhales, what happens to air sacs
Air sacs collapse and release air to trachea
Subdivisions of avian parabronchi wall
Atria
Epithelium in atria of avian
Cuboidal or squamou’s epithelium
Air capillaries epithelium and function
Air capillaries b’ring air to atria and are lines by simple squamous epithelium
What is in the walls of the parabronchi
Smooth muscle