Respiratory Histology Flashcards
What is respiratory epithelium?
Pseudostratified cilliated columnar epithelium with goblet cells. Slide 6
What are the cells lining the oropharynx and why these type?
Non-keratinized stratified sqamous epithelium to resist abrasion. Slide 12
Which side of the epiglottis is exposed to swallowed food?
The anterior surface when flopped over. Slide 13
What is special about the cells lining the vocal folds?
It is not respiratory epithelium, it is stratified squamous epithelium. Slide 14
What holds the C shape of the cartilage in the trachea together?
A fibroelastic tissue and smooth muscle. Slide 16
What makes up the trachea?
Respiratory epithelium, connective tissue, seromucous glands and rings of hyaline cartilage. Slide 17
What is the bronchi made up from?
Irregularly shaped plates of cartilage, respiratory epithelium, smooth muscle, adipose tissue and seromucous glands. Slide 18
What makes up the bronchioles?
Respiratory epithelium (more cuboidal shape), smooth muscle, elastic fibres and NO CARTILAGE. Slide 19
What are the terminal bronchioles lined with?
Cuboidal ciliated epithelium and have non-ciliated Club (clara) cells. Slide 22
What is the role of club cells?
Stem cells, detoxification (enzymes), surfactant type production. Slide 22
What are the 2 cell types in alveoli?
Alveolar cell Type I and II and are also called pneumocytes. Slide 27
What do type I pneumocytes do?
Cover 90% of the alveolar surface as simple squamous epithelium. Slide 27
What do type II pneumocytes do?
Contain lamellar bodies which have surfactant in them and are polygonal in shape. Slide 28
What is present in the alveoli other than cell walls and air?
Alveolar macrophages which engulf inhaled particles which weren’t trapped by the mucous lining. Slide 30
What makes up the air blood barrier?
Endothelial cell, basal lamina and a type I pneumocyte. Slide 32
