Span classnews_dtdec 07 2017spannbsp018332the recurrent laryngeal branches of the vagus nerves ascend into the larynx within the groove between the esophagus and the trachea the left recurrent laryngeal nerve originates in the thorax looping under the aortic arch before ascending while the right recurrent laryngeal nerve originates in.
External laryngeal n br of superior laryngeal n supplies cricothyroid m recurrent laryngeal n supplies all other mm.
Divided into 3 parts 1 vestibule 2 ventricle 3 subglottic space vestibule extends from laryngeal inlet to vestibular folds boundaries anterior posterior surface of epiglottis posterior interval between arytenoid cartilages lateral inner surface of aryepiglottic folds and upper surfaces of the false cord 64.
Description the laryngeal inlet entrance of the larynx is a triangular opening wide in front narrow behind and sloping obliquely downward and backward it is bounded in front by the epiglottis behind by the apices of the arytenoid cartilages the corniculate cartilages and the interarytenoid notch and on either side by a fold of mucous membrane enclosing ligamentous and muscular.
Pharynx boundaries anterior cervical region of vertebral column posterior nasal cavity oral cavity larynx laryngeal inlet piriform fossa aryepiglottic fold laryngeal inlet opening to the larynx in laryngopharynx three outer circular muscles surrounding the pharynx called superior middle and inferior pharyngeal constrictors.
On each side of the laryngeal inlet the lateral wall of laryngopharynx presents the piriform fossa which is a mucous covered deep depression and presents the following boundaries medially the aryepiglottic fold laterally the mucous membrane covering the medial surface of the lamina of thyroid cartilage and thyrohyoid membrane.
Act as sphincters to reduce size of laryngeal inlet what arteries supply blood to the larynx superior and inferior laryngeal arteries branches of superior and inferior thyroid arteries respectively.
Elastic mlies beneath the laryngeal mucosa fibrous framework of the larynxventricle of the larynx ventricle of morgagniquad membrane boundaries extending from lateral margin of epiglottis to arytenoid and corniculate cart and inferiorly to the false cord.
Describe the boundaries muscles fascia vasculature and innervation of the pharynx and the boundaries of the retropharyngeal space boundaries the pharynx is a common space for the conductive pathways of the respiratory gases and digestive food and drink systems.