Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Congenital Defects & Pediatrics IA > Vascular Embryology: Topic 7 > Flashcards

Vascular Embryology: Topic 7 Flashcards

1
Q

Vascular development occurs by what two mechanisms?

A

Vasculogenesis

Angiogenesis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Vasculogenesis

A

Coalescence of angioblasts

i.e. Major vessels such as the dorsal aorta and cardinal veins

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Angiogenesis

A

Vessels sprout from existing vessels

I.e. remainder of vascular system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What leads to enlargement of some vessels while other vessels are obliterated?

A

Preferential flow related to the development of organs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

How does enlargement of vessels occur?

A

By way of fusion with smaller vessels and partly by enlargement of individual capillary beds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are the major arterial conduits in the early embryo?

A

Dorsal aortas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is simply a continuation of the endocardial tubes?

A

Dorsal aortas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Where do dorsal aortas arise from?

A

Aortic sac (distal most part of the truncus arteriosus)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What establishes the first pair of aortic arches?

A

Because of the changing position of the developing heart tube and pericardium, the cranial portions of the dorsal aortas come to describe an arc on both sides of the foregut

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How many pairs of aortic arches are present at some point during development?

A

6 pairs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the only transient aortic arch?

A

5th aortic arch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is notable about the 5th aortic arch?

A

It never forms or forms incompletely and regresses

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How are the aortic arches numbered?

A

I, II, III, IV, VI

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What happens to the arches as they develop?

A

Some become modified and others regress

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

At day 27, the aortic arch I has largely disappeared. Part of it remains and becomes what?

A

Maxillary Artery

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Remnant of Arch II becomes what?

A

Stapedial Artery

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Aortic arches IV and VI are being formed as what?

A

Ventral and dorsal sprouts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What does Arch III form?

A

Common carotid artery and first part of the internal carotid artery

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What does Arch IV become?

A

Left Arch IV

Right Arch IV

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Left Arch IV

A

part of the aortic arch between LCC and L. Subclavian

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Right Arch IV

A

Proximal R. Subclavian

22
Q

Aortic Sac becomes…

A

Ascending Aorta
Aortic Arch
Brachiocephalic Artery

23
Q

First Arches become…

A

Maxillary Artery (portion)

24
Q

Second Arches become…

A

Stapedial Artery (portion)

25
Q

Third Arches become…

A

Carotid Arteries

26
Q

Fourth Arches become….

A

Right-Proximal Right Subclavian Artery

Left- Aortic arch segment between left carotid and left subclavian artery

27
Q

Fifth Arches become…

A

Transient and never well-developed

28
Q

Sixth ARches become

A

Right- Proximal (proximal R pulmonary arterY)/Distal (distal portion disappears)
Left-Proximal(proximal left pulmonary artery) / Distal (ductus arteriosus)

29
Q

Right Dorsal Aorta becomes…

A

portion becomes the right subclavian

30
Q

Left Dorsal Aorta becomes…

A

Distal aortic arch and descending aorta

31
Q

Right Intersegmental Artery becomes…

A

part of right subclavian artery

32
Q

Left Intersegmental Artery becomes….

A

left subclavian artery

33
Q

What is the major point of entry into the common atria?

A

Sinus venosus

34
Q

Sinus venosus remains paired until the embryo is how many mm, even after the endocardial tubes fuse?

A

4 mm

35
Q

In a 4mm embryo, there is a distinguishable …… (3)

A

Central (unpaired) portion
Transverse portion
Right and left sinus horns

36
Q

Mid 4th week, the sinus venosus receives blood form where?

A

Right and left sinus horns

37
Q

Each horn receives blood from what 3 veins?

A

Vitelline vein
Umbilical vein
Common Cardinal Vein

38
Q

AT what week does the obliteration of the right umbilical vein and left vitelline vein occur?

A

Occurs 5th week

39
Q

At what week does the left common cardinal vein become obliterated?

A

Week 10

40
Q

What is the entrance to the common atrium called?

A

Sinuatrial orifice

41
Q

Sinuatrial orifice is flanked on each side by what?

A

Valvular folds

42
Q

Sinus venosus receives 3 pairs of veins called wha/

A

Vitelline veins
Umbilical veins
Common cardinal veins

43
Q

Vitelline veins

A

carry blood from the yolk sac to the sinus venosus; enter the sinus venosus

44
Q

Umbilical veins

A

originate in the chorionic villi and carry oxygenated blood to the embryo; enters the sinus venosus lateral to the vitelline veins

45
Q

Common cardinal veins

A

drain the body of the embryo

46
Q

In the primitive heart (tube), the left and right sinus horns drain into what?

A

Central sinoatrial orifice

47
Q

Vitelline veins give rise to what veins?

A

Hepatic veins

48
Q

Umbilical venous system persists as what in the term fetus?

A

Umbilical vein

49
Q

Cardinal venous system

A

enter the sinus venosus lateral/superior to the umbilical veins, forms a large complex network of veins throughout the body

50
Q

Subcardinohepatic anastomosis was once…

A

Right umbilical vein

51
Q

What will eventually become the coronary sinus?

A

Left sinus horn

Congenital Defects & Pediatrics IA (17 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions