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CPR I > Great Vessels Embryo > Flashcards

Great Vessels Embryo Flashcards

1
Q

where does the paired dorsal aorta fuse?

A

T4 axial level

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2
Q

Longitudinal anastomosis of 7 cervical segments become?

A

verterbral arteries

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3
Q

L 7th interseg artery becomes? R 7th?

A

l subclavian a

portion of r subclavian

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4
Q

what makes the r subclavian a?

A

R 7th intersegmental a, distal part of r dorsal aorta, and proximal part of aa IV

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5
Q

12 thoracic intersegmental longitudinal anastomisises make?

A

internal thoracic a

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6
Q

thoracic intersegmental a themself alone make?

A

intercostal a

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7
Q

lumbar anastomosis make?

A

epigastric and iliac vessels

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8
Q

arch I makes?

A

maxillary a

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9
Q

arch II makes

A

stapedial a

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10
Q

purpose of arch III? What does it make?

A

feeds the head

common carotid, prox part of internal carotid, external carotid

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11
Q

what makes the internal carotid

A

dorsal aorta and arch III

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12
Q

what makes the aortic arch in a newborn?

A

aortic sac, L aa IV, L dorsal aorta prox and distal to 7th interseg a

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13
Q

what does the spiral septum of the outflow tract do?

A

insures connection of l aa IV to LV

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14
Q

arch VI makes?

A

pulmonary a (with help of aortic sac)

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15
Q

What puts recurrent laryngeal n where it is in the adult body?

A

regression of distal part of R AA VI arch (not connected to R dorsal aorta) makes it hook around future r subclavian

on the left, ductus arteriosus remains so RLN remains hooked around distal VI arch

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16
Q

What happens to the carotid duct?

A

aa II and aa IV - goes away

along with the R dorsal aorta between 7th interseg and where it joins with the L

17
Q

what does the r and l dorsal aorta fuse to make? (after all the rest of r is obliterated?

A

descending thoracic and adb aorta

18
Q

what a connect with bladder and connect placenta - dorsal aorta?

A

umbilical arteries

and a connection between 5th lumbar interseg a and distal umbilical a

19
Q

what does the distal end of umbilical a become after birth?

what does the proximal end become?

A

medial umbilical ligaments

prox portion of 5th lumbar interseg a (iliac vessels) -> umbilical arteries

20
Q

what supples the bladder?

A

superior vesicular a from umbilical a

21
Q

what part of the body receives the most oxygenated blood, which gets the least?

A

head/neck most from placenta

LE/everything else gets mixed blood from the ductus arteriosus after the aorta gives off branches to the head

22
Q

what carries blood from yolk sac to sinus venosus?

what do they form as liver grows

A

vitelline

vascular plexus called hepatic sinusoids

23
Q

which side of sinus venosus stays?

A

R sinus venosus, blood flow shifts to the R side of liver

24
Q

what forms terminal part of IVC

A

prox R vitelline vein -> r hepatocardiac channel -> IVC

25
Q

what inferior parts of vitelline veins make if they haven’t regressed

A

portal v, sup/inf mesenteric v, splenic v

26
Q

what umbilical v carrys placental blood to the liver?

A

l umbilical v

27
Q

what forms from connection between L umb v and r hepatocardiac channel?

A

ductus venosus

lets blood bypass sinusoidal plexus

28
Q

what keeps ductus venosus open in pregnancy?

what does form into after birth?

A

prostaglandins

ligamentum venosum

29
Q

what does l umbilical v become after birth

A

ligamentum teres hepatis

30
Q

what does anastomoses bw l and r ant cardian veins drain?

A

blood from head and neck into card v on R side

31
Q

what makes the l brachiocephalic v

A

anastomosis of ant cardinal veins

32
Q

what connects to posterior cardinal veins?

A

subcardinal and supracardinal v

33
Q

subcardinal and supracardinal v functions?

A

subcardinal - v to kidney/gonads, helps make abd IVC

supracardinal v - part IVC and azygos system, veins draining body wall

CPR I (12 decks)

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