Ch. 99-103 Respiratory System Flashcards
what are the ala nasi?
the wings of the nostrils shaped by paired dorsolateral cartilages
what are the supporting ligaments of the external nose?
the dorsal nasal ligament - connects the dorsal midline of the nasal bone at the bony nasal aperture to the dorsal lateral nasal cartilage
the paired lateral nasal ligaments
what are the attachments of the levator nasolabialis? what is its function?
extends from dorsal midline of the muzzle on the frontal and maxillary bones to insert on the upper lip and nose
increases the diameter of the nares and lifts the upper lip
what muscles increase the diameter of the nares
levator nasolabilias
orbicularis oris
levator labii maxillaries and its labial part, the caninus
what are the three paranasal sinuses?
maxillary recess
sphenoidal sinus
frontal sinus
Where is the maxillary recess?
the lateral aspect of the nasal fossa approximately at the level of the last premolar and first molar
where is the sphenoid sinus?
lies within the presphenoid bone and houses a portion of the ethmoidal conchae
what is the stomodeum?
an invagination of ectoderm that is the precursor to the oral cavity
It is surrounded by the ventral mandibular and dorsal maxillary prominences which come from the first pair of pharyngeal arches
what provides sensory innervation to the oral side of the hard palate?
maxillary branch of the facial nerve
what is the principal blood supply to the soft palate?
minor palatine arteries, which branch off the maxillary arteries before they enter the infraorbital canals
what is the sensory innervation to the soft palate?
the minor palatine branch of the maxillary portion of the trigeminal
what are the two functions of the soft palate during swallowing?
- stimulation of sensory nerves will trigger swallowing
2. closure of the intrapharyngeal opening during swallowing and vomiting
where does the hyoid apparatus articulate with the skull?
the tympanohyoid cartilage articulates with the mastoid process of the temporal bone
the thyrohyoid bone articulates with the thyroid cartialge
what are the extrinsic muscles of the larynx? what are the innervations?
thyropharyngeus
cricopharyngeus
innervated by glossopharyngeal and vagus nerves
what muscles closes the opening of the nasopharynx while swallowing
palatopharyngeus
and paired levator veli palatini elevate the soft palate