Respiratory System Flashcards
7 functions of RS?
Filtration, Humidification, Warming, Olfaction, Speech, Gas transport & exchange, protection against infection
What does Respiratory epithelium line?
Tubular portion of RS
Two types of epithelia in nose?
Keratinising at front, further back is non-keratinising
What else does nasal cavity contain in particular?
Vascular lamina propria (Has seromucinous glands)
2 roles of nasal sinus?
Adds resonance to skull, and decreases weight of skull
What is the larynx mostly formed of?
Hyaline cartilage
Vocal cord epithelium?
Stratified squamous with overlying loose irregular FT
Function of Trachealis muscle?
Bridges gap of hyaline cartilage
How do bronchioles differ in structure from bronchi? (3)
No cartilage, few goblet cells, and ciliated columnar epithelium
Where are Clara cells found and function?
Terminal bronchioles and help to produce surfactant (Have lots of SER, mitochondria and secretory granules)
Function of Respiratory bronchioles?
Gas exchange and transport, and link terminal bronchioles and alveolar ducts
Shape and function of T1P?
Flattened cell, few organelles, and used in oxygen exchange
Shape and function of T2P?
Rounded cell, lots of mit, 60% of cell pop and produce surfactant
Role of surfactant?
Reduce tension, so easier to inflate lungs
What type of cells are alveolar macrophages and how do they leave interstitium?
Luminal cells, and leave via lymphatics/mucociliary escalator
