dissection heart and great vessels Flashcards
mediastinum
space in the thoracic cavity between the pleural cavities
where do the vagus nerve orgiginate and type of nerve
medulla
mixed, parasympathetic
motor to pharynx,laryx and soft pale
sensory to muscosa of lari
where do the recurrent larngeal nerves come from and which is more diffuclt to find
vagus - split in thorax
right (shorter and loops around the subclavian artery)
what do the recurrent laryngeal nerves supply
muscles of the larynx
sensory to largyx below level of vocal cords/trachea
if the left recurrent largyeal nerve is longer what is clinical signigicance
increased potential to be affected, medial location e.g. lung cancer may compress nerve
where is the ligamentum arteriosum located
between the pulmonary trunk and aorta
what was before the ligamentum arteriosum
ductus arteriousus
shunted blood from the pulmonary trunk to aorta
what happens if the ductus arteriosus fails to close at birth
oxygenated blood can flow from left to right from aorta
shortness of breath and trachycardia
what come off the arch of aorta
bracheicephalic (right subclavian and right common carrot)
left common carotid
left subclavian
what do the subclavian arteries suppyl
arms, chest, back, head
what do the carotid arteries supply
internal - brain
external - neck oesophagus, pharynx laryxl lower jaw and face
surface landmarks of the heart
right/left borders
apex
superior border
right border right artrium, right ventricle (3rd coastal to 6th costal cartilage) left border left ventricle, left auricle (2nd space to apex) apex 5th left IC space, mic clavicular line superior border lies behind the sternal angle right side more superficial ventricles anterior to the atria
what does the left coronary archery branch into
anterior inter ventricular
circumflex
what are the branches of the right coronary artier
posterior inter ventricular
right marginal branch
where do the coronary arteries arise from
aorta immediatly above the aortic valve
