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Carnegie Stage Section
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Abbreviation Key

a
artery
aa
arteries
ant
anterior
a-v
atrio-ventricular
C
Cervical
Co
Coccygeal
CN
Cranial Nerve
D
diencephalic neuromere or diencephalon
dm
dermatomyotome
inf
inferior
int
internal
L
Lumbar
lat
lateral
lt
left
M
mesencephalic neuromere or mesencephalon
med
medial
n
nerve
O
Occipital
P
prosencephalon
post
posterior
prim
primordial
R
rhombencephalon
Rh
rhombomere
rt
right
S
Sacral
T
Thoracic
v
vein
vv
veins
close
T-2 / T-3 interganglion region, ascending aorta, auricle of left atrium, auricle of right atrium, central canal, heart prominence, interventricular sulcus, left vagus nerve (CN X), left ventricle, neural arch, rib 3, rib 4, rib 5, rib 6, rib 7, right pulmonary artery, right vagus nerve (CN X), sulcus limitans, trabecular part of right ventricle, tracheal bifurcation, ulna, upper lobe of left lung
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Carnegie Embryo #4090   |   Location: 15-7

Keywords: T-2 / T-3 interganglion region, ascending aorta, auricle of left atrium, auricle of right atrium, central canal, heart prominence, interventricular sulcus, left vagus nerve (CN X), left ventricle, neural arch, rib 3, rib 4, rib 5, rib 6, rib 7, right pulmonary artery, right vagus nerve (CN X), sulcus limitans, trabecular part of right ventricle, tracheal bifurcation, ulna, upper lobe of left lung

Source: The Virtual Human Embryo.