Respiratory Histology Flashcards
What defines the URT/LRT?
URT - anything above vocal folds
LRT - anything below vocal folds
What type of cartilage found in the trachea? What is the advantage of this over bone?
Hyaline cartilage
Light weight
Describe the tertiary bronchi
Smooth glands Sparse glands Cartilage Submucosa Lymphocytes
How does elastic stain?
Very dark!!
Describe bronchioles
Smooth muscle
Veins
Most resistance to air flow - smaller tube more resistance
What is visceral pleura called?
Mesothelium
Which structures disappear during tissue processing?
Phospholipids
Describe the micro anatomy of the lung lobe, from large structures first
Primary bronchi Secondary bronchi Tertiary bronchi Bronchioles Terminal bronchioles Respiratory bronchioles Alveolar duct Alveolar sac Alveoli
Why do lungs appear Lacey?
Thin alveolar walls
Describe alveoli structure
Simple squamous
Thin cytoplasm
Type 1 alveolyctes/pneumocystis are responsible for
Gas exchange
What do type II do?
Release surfactant to relieve surface tension
Release fluid to keep alveoli moist
Why are there pores between alveoli?
Allow macrophages to travel from one to anther
What is the respiratory epithelium?
Ciliated pseudostratified columnar epithelium
Goblet cells produce mucous
Which 5 cartilages make up the larynx?
Arytenoid
Cricoid - paired
Thyroid
Epiglottic
