Thorax anatomy Flashcards
which lymph nodes drain most of the breast?
Axillery
what are the different types of ribs?
The top 7 ribs are true ribs, 8-10 are false ribs and 11-12 are floating ribs
what is the parietal plaura inorvated by?
the costal - intercostal nerves
mediastium and diaphragmatic - phrenic nerve so its felt as referd pain to C 3 4 5 dermatome
where do the lungs end?
anterior - 6th rib
midaxillery - 8th rib
posterior - 10th rib
what is the bottom ring of cartilage on the trachea called?
carina
which bronchus is food more likely to go down?
the right - it is wider and more vertical
what is a bronchopulmonary segment?
the area of lung
supplied by a segmental bronchus and its accompanying pulmonary artery branch.
where is the bifurcation of the pulmonary trunk?
The bifurcation of the pulmonary trunk occurs to
the left of the midline just inferior to vertebral level TIV /V
what is the crista terminalis
a ridge of smooth muscle that divides the pectinate muscle origin and the right atrial appendages in the right atrium.
what is the right auricular apendage
a small, ear-shaped sac in the muscle wall of the left atrium (top left chamber of the heart).
The auricle is a small sack that is lumpy on the inside due to ridges of muscles called musculi pectinanti.
it is derived from the embryonic primitive atrium.
where does the coronary sinus drain into
directly into the right atrium
whats is teh last ring of cartilage in teh trachea called
carina
where do the left intercostals drain into
top ones -superiour intercostal vein
middle - acessory hemiazygous vein (then into the azygous)
bottom - hemiazygous vein (then into the azygous)
what is teh oesophogus innorvated by
vagus nerve
what innorvates the pectoral muscles
pectoralis nerve
whihc way do teh external interconstal muscles run
tits to pockets
what provides oxygenated blood to teh lungs
bronchiol artherys
what are the layers of the heart
Fiberous pericardium
serous pericrdium - parietal and viscerasl (epicardium)
myocardium
endocardoium
where is a stethiscope placed to heart the heart sounds
aortic - second intercostal space right of the sternum
pulmonic - second intercostal space left of the sternum
Erbs point- 3rd intercostal space left of the sternum
tricuspid- 5th ics lower left sternal boarder, mitral - 5th intercostal space mid clavicular line
what is the auricular appendage
a small ear lie outpouch made from teh embryonic primitive atrium, it is treberculated and serpeated from teh normal atria by te crista termanalis
what does trabeculae carnea mean?
fleshy beams! yummuy!
what are papillery muscels
connected to te chora tendenae to close teh c=valves of teh heart during contraction
what are the variations in people for the posterior introventricular artery?
• 90% of people have a right posterior interventricular branch, 30% have a left and 10% have only a left one
when do teh coronary arteries fill?
• Tyeh coronary arteries fill during diastole when the heart is not contracting and the oressure is reduced in the myocardiou but is hight nteh aorta
