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ARTERIAL & VENOUS SYSTEMS - Coggle Diagram
ARTERIAL & VENOUS SYSTEMS
Vasculogenesis: begins>>blood islands in mesoderm>3rd week outside embryo
ARTERIES
Blood vessels in Yolk sac>>
vitelline system
>>gut >>yolk sac regress
Sprouts of D.Aorta
Lateral>adrenal,gonads,kidneys
Posterolateral>intercostal & lumber seg. arteries
Aortic arches
3rd
>carotid system
4th
>Right arch forms the right subclavian artery
Left arch forms part of the arch of the aorta
6th
>pulmonary arteries>connect>mesenchyme surrounds bronchial buds
1,2,5
>regress
1.maxillary, 2.
hyoid
and
stapedial
arteries..
Umblical arteries
>conect to dorsal aortae>>ext. iliac arteries
Limb arteries
>remodelling of interseg. arteries>from 7th Cerv. to 5th Lumber
VEINS
12 weeks
:
LVV
regress>L side blood of a.viscera>drain to right
enlarged RVV>>
IVC
Liver Sinusoids
from Vitelline Veins>final channel>.drains into IVC
Distal RVV
>portal V.S
R umblical vein
>destroyed in 2nd mnth
L umblical vein
>anastomoses with ductus venosus
Vitelline veins start in YS
Veins Cntd.
R Subcardinal
>IVC
Supracardinal
>>upper part of IVC & azygous sytem
Post cardi. veins
>augmented replaced by Subcardinal & supracardinal V.
IVC>>formed from 4 diff. systems
Anterior cardinal veins
>blood from head & neck
8th wk
: SVC drains blood