Respiratory anatomy Flashcards
what are the nerve roots for the primary innervation of the diaphragm?
C3 C4 C5
keep the diaphragm alive
how many lobes are there in the right lung?
3
why are there only 2 lobes on the left lung?
space taken up by the heart
what nerve innervate the diaphragm
phrenic
what is the parasympathetic supply of the lungs?
vagus nerve
at what vertebral level is the carina?
T4/5
what is the carina
bifurcation of the trachea into two main bronchi
what is the anatomical surface marking of the horizontal fissure?
right 4th rib
what type of epithelium is respiratory epithelium?
ciliated pseudostratified columnar epithelium
what is the role of cillia?
keep the airway clear, removal of mucous which collects bacteria and dust which is inhaled
role of type 1 pneumocytes
thin barrier for diffusion, connected by tight junctions
role of type 2 pneumocytes
secret surfactant, decreases surface tension
role of alveolar macrophages
immune cells, derived from monocytes, ingest bacteria and particles
what are the pores of kohn
holes that keep lungs ventilated, allows transmission of infection
what are the role of the 3 turbinates in the nose?
double the surface area of the nose and create the superior, middle and inferior meatus
to increase the amount of inspired air that can come into contact with the cavity walls
make the air flow slower and more turbulant
what is the function of the nose
control the temperature of inspired air
filter function
defense- cillia take inhaled particles backwards to be swallowed
what are the turbinates/ conchae
curved shells of bone projecting out of the lateral walls of the nasal cavity
what are meatuses
pathways of air caused by turbinates
describe the features of the superior, middle and inferior meatus
superior- olfactory epithelium, cribriform plate. sphenoid sinus
middle- sinus openings
inferior- nasolacrimal duct (drain tears from eyes)
where do the paranasal sinuses drain into
nasal cavity
what are the 4 sinuses
frontal sinus,
ethmoid sinus
maxillary sinus
sphenoid sinus
nerve supply to frontal sinus
ophthalmic division of V nerve