nasal cavity, larynx, bronchi Flashcards
what does superior nasal meatus contain?
- openings of sphenoid sinus and post ethmoidal cells
what does middle nasal meatus contain?
- contains openings of frontal sinus, maxillary sinus, ant and middle ethmoidal cells
what does inf nasal meatus contain?
- has opening of nasolacrimal duct
blood supplu of nasal cavity?
- ant and post ethmoidal a.< opthalmic a.
- descending palatine a< maxillary a
- sphenopalatine a. < maxillary a.
- facial a.
nerve supply of nasal cavity?
- ant ethmoidal n.
blood supply of larynx?
- sup laryngeal a.< sup thyroid a < external carotid a.
- inf laryngeal a.< inferior thyroid a. < subclavian
venous drainage of larynx?
- sup laryngeal vein–> internal jugular v.
- inf laryngeal vein –> thyroid plexus–> left brachiocephalic
innervation of larynx?
- superior laryngeal n.
- recurrent laryngeal n.
the cartilages making up the larynx?
- thyroid cartilage
- cricoid cartilage
- arythenoid cartilage ( elastic cartilage)
- epiglottic cartilage ( elastic cartilage)
- cornicualte cartilage
- cuneiform cartilage
extrinsic membranes of larynx?
- thyrohyoid membrane (median and lat thyrohyoid lig)
- cricothyroid lig
- cricotracheal lig
- hyo-epiglottic lig
intrinsic membranes of larynx?
- quadrangular lig ( aryepiglottic fold–> arythenoid + corniculate cartilages. Inf free edge form vertibular lig.
- cricothyroid membrane:
- ## from arch and lamina of cricoid cartilage–> arythenoid cartilage. sup edge forms vocal lig.
joints of larynx?
- cricothyroid joint
- cricoarythenoid joint
cricothyroid joint?
- hinge
- transverse axis
- b/w cricoid articular surface and inf horn of thyroid
- ventro/dorsal swaying
cricoarythenoid joint?
- pivot
- vertical axis
- b/w arytheoid articular srfc on cricoid and cricoid articular srfc on arythenoid
- shift and rotation, fundamental for abduction and adduction of vocal lig.
cricothyroid muscle origin, insertion and function?
- from cricoid cartilage (ventral) –> caudal margin of thyroid cartilage
- thightening the vocal folds
lateral cricoarythenoid origin, insertion and function?
- from lateral margin of cricoid cartilage–> muscular process of arythenoid.
- narrows rima glottides. ( cartilaginous part)
thyroarythenoid origin, insertion and function`?
- from internal side of thyroid cartilage–> vocal process of arythenoid.
- constrict rima glottides
posterior cricoarythenoid origin, insertion and function?
- post cricoid cartilage –> muscular process of arythenoid
- widens rima glottides
oblique arytenoid origin, insertion and function?
- obliquely connect both arythenoid on dorsal sides
- narrows rima glottides
transverse oblique origin, insertion and function?
- transversely connevt the arythenoid cartilages on dorals side
- narrows rima glottides ( membranous part)
aryeppiglottic origin, insertion and function?
- fasicles of oblique arythenoid extending to lateral margin of the epiglottic cartilage.
- forms aryepiclottic fold
- lowering the epiglottis–> narrowing entrance to larynx.
vocalis origin, insertion and function?
- post thyroid cartilage–> vocal process of arythenoid
- relaxes the vocal cords
thyroepiglottis origin, insertion and functio?
- inner srfc of thyroid cartilage–> epiglottis
- depresses the base of epiglottis and constrict the entrance into larynx?
innervation of the muscles of larynx?
- All muscles are innervated by reccurent laryngeal n. except for cricothyroid which is innervated by superior laryngeal n.
how many tracheal cartilages do wehave?
- 15-20
where does trachea bifurcates?
- T4
what are the ligaments called b/w trachea?
- called annular lig
arterial supply of trachea?
- tracheal a.< inf thyroid a.
- bronchial a. < descending aorta
venous drainage of trachea?
- tracheal veins–>
innervation of trachea?!
- reccurent laryngeal n.
- vagus
Kisselbach plexus?
- ant ethmoidal
- post ethmoidal
- greater palatine
- sphenopalatine
- septal branch of sup labial
