Development of the Arterial System
Development of the Arterial System
= connected via dorsal aorta
Branches of the Dorsal Aorta
-----------------------
right and left dorsal aortae
first aortic arch
aortic sac
second aortic arch
third aortic arch
fourth aortic arch
sixth aortic arch
dorsal aorta
fuse caudal to arch 6 at levels T4-L4
segmental arteries – esp. 7th intersegmental arteries –
supply upper limb
regresses
maxillary arteries
regresses
stapedial arteries
still connected to aortic sac
common carotid arteries
internal carotid arteries
external carotid arteries
R regresses
Note: this applies only to the R dorsal aorta between fused aorta and 7th intersegmental a.
right subclavian artery
R
brachio-cephalic artery
aortic arch & cranial part of descending aorta
R
L
rest of descending aorta
L
left subclavian artery
L
ductus arteriosus
L
ligamentum arteriosum
pulmonary arteries
L
Innervation of larynx (which develops in cage of aortic arches)
vagus nerve (CNX)
recurrent laryngeal nerves (inferior larynx)
right recurrent laryngeal n. – hooks around right subclavian a.
left recurrent laryngeal n. – hooks around ductus arteriosus / ligamentum arteriosus
ventral branches – vitelline system – surrounds yolk sac
thorax
esophageal branches
abdominal
celiac a.
superior mesenteric a.
inferior mesenteric a.
lateral branches – supplies adrenal glands, gonads, and kidneys
suprarenal arteries
gonadal arteries (long)
renal arteries (short)
dorsolateral branches – intersegmental arteries
sprout between developing somites (cervical – sacral)
7 cervical – longitudinal anastomoses with each other
1st 6: lose connections with dorsal aorta; anastomoses give vertebral arteries
7th – connects to vertebral arteries and becomes subclavian arteries
thoracic & lumbar
intercostal arteries
lumbar arteries
sacral arteries
limbs
axial arteries
arm
anterior interosseous artery
brachial artery
deep palmar arch
leg
internal iliac artery
external iliac artery
common iliac a. – fifth lumbar intersegmental a.
schiatic a.
popliteal a.
peroneal a.
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