anatomy Flashcards
external ear composed of
cartilaginous pinna (auricle) and external acoustic meatus (ear canal)
pinna is formed by?
elastic catilage attached to temporal bone
respiratory epithelium is
ciliated columnar epithelium
what is the cribriform plate of ethmoid
part of ethmoid bone which has low density and is spongy
contents of foramen magnum
spinal cord, vertebral arteries and accessory nerves
contents of cribriform plate
axons of olfactory cells in olfactory epithelium
contents of internal auditory canal
vestibolucochlear nerve and facial nerve
formane ovale contents
mandibular nerve (CNV3) and accessory menigeal artery
contents of foramen rotundum
maxillary nerve (CNV2)
contents of hypoglossal canal
hypoglossal nerve (CNXII)
contents of jugular foramen
CN IX, X and XI, superior bulb of internal jugular vein
contents of superior orbital fissure
opthamalic veins, opthamalic nerves (CNV1), CNIII, IV, and VI
olfactory pathway
receptor cells in olfactory epithelium
pass up through cribriform plate
synapse with olfactory bulb (ganglia)
then neurons pass along olfactory tract to temporal lobe and olfactory areas
drainage of right and left frontal sinuses
through the frontonasal duct into the ethmoid infundibulum which opens into semilunar hiatus of middle nasal meatus
ethmoid bulla
swelling on the superior border of semilunar hiatus
nasocrinmal duct drain into?
inferior nasal meatus (excess tears)
boundaries of nasopharynx
posterior to the nasal cavity to the soft palate (respiratory function)
boundaries of oropharynx
soft palate to superior border of the epiglottis (digestive)
boundaries of laryngopharynx
superior border of epiglottis to inferior border of cricoid cartilage (digestive)
type of cartilage is the epiglottis
elastic
supraglottis included
the laryngeal vestibules and ventricles
define the borders of oral vestibule
between internal surface of lips and external surface of teeth
define the borders of oral cavity proper
between internal surface of teeth and oropharynx
which bones form the hard palate
palatine bones and maxillary
arterial contributions of kiesselbach’s plexus
first set come from opthamalic artery: anterior and posterior ethmoidal
next come from maxillary: sphenopalatine artery and greater palatine artery
facial artery: (lateral nasal artery not a contribution) and septal branch of superior labial artery
pars tensa
inferior and larger part of the tympanic membrane
made of 3 layers
