ANATOMY
45
Thorax – Organs
8.
What is true of the anatomy of the trachea? P1098 NM and Wiki
a.
It is 20cm long and bifurcates below the manubrium
sternum?
F - 10cm longs and bifurcates at t4/t5 which is at the level of the
manubriosternal joint
b.
it starts at the level of the cricoid cartilage
T - starts just below the level of the cricoids cartilage p 187 lasts
c.
it is 5cm diameter in the adult
F - 10cm long
d.
bifurcates just below manubrium
T - at the level of T4 (starts at C6)
e.
bifurcates just below the sternal angle
F - AT the sterna angle
f.
starts at level of C4
F - C6-T4
g.
drains to axillary lymph nodes
F - deep cervical, pre/paratracheal nodes
h.
is supplied by glossopharyngeal nerve
F - vagus and recurrent laryngeal
i.
is marked at it’s lower end by the sternal angle
T
j.
enters the thoracic inlet slightly to the left
F - Pretty much midline
k.
commences below the cricoid at the level of C5
F - this is C6
l.
bifurcates below level of lower border of lower manubrium T - at the manubrio sternal jt (T/4/5)
m.
trachealis muscle aids swallowing
F - It lines the gap between the cartilage rings posteriorly.
It acts to constrict the trachea and thereby increase velocity of flow in coughing
9.
The oesophagus is narrowest at:
a.
level of cricopharyngeous
T - p201 Lasts
b.
C6
F
c.
At cardiac orifice
F
d.
C4
F
10.
The oesophageal opening in the diaphragm is at
a.
T6
F
b.
T8
F - SVC + R phrenic
c.
T10
T - + vagus
d.
T12
F - Aorta + azygous and hemiazygous, thoracic duct
e.
L1
F
11.
What travels through the diaphragm with the oesophagus p328 NM
a.
right vagus
T – at T10
b.
azygous vein
F - with aorta T12
c.
hemiazygos vein
F - but not sure if it goes through
d.
greater splanchnic nerves
F - goes separately through
e.
thoracic duct
F - with aorta T12
f.
posterior vagal trunk
T – at T10
g.
sympathetic trunks
F
h.
thoracic duct
F
i.
phrenic nerves
F – with IVC at T8
j.
vagus nerve
T
Summary:
T8: IVC + terminal branches of the R phrenic n and lymphatics,
T10: Oesophagus + vagus (way to remember: it is CNX and goes through
diaphragm at T10...), L gastric vessels, lymphatics
T12: (it is actually an opening posterior to the diaphragm) Aorta, thoracic duct,
azygous and hemiazygous
