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.

................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download