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Embryology > Cardio > Flashcards

Cardio Flashcards

1
Q

When does the cardiovascular system develop?

A

By the end of the 3rd week

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2
Q

What is the development of new blood vessels?

A

Angiogenesis

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3
Q

What cells are responsible for angiogenesis

A

Angioblasts

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4
Q

Angioblasts develop from….

A

1) Splanchnic Mesoderm
2) Mesenchyme of Yolk Sac
3) Mesenchyme of Umbilical Cord
4) Mesoderm of the Chorion

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5
Q

When do the paired vessel begin to form?

A

the 3rd week

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6
Q

What is the first pair of logitudinal vessels?

A

Dorsal Aorta

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7
Q

What are the two aspects of the dorseal aorta?

A

Aortic Arches, Heart Primordia

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8
Q

What is the function of the vitelline veins?

A

return blood from the yolk sac

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9
Q

What is the function of the umbilical veins?

A

Bring blood from the chorion (placenta)

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10
Q

what is the function of the cardinal veins

A

return blood from the body

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11
Q

what from to evetntually form the heart tube

A

the two thin walled endothelial heart tubes

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12
Q

T/F: The bulbus and ventricles form faster than the rest of the heart?

A

True

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13
Q

What is the shape of the developing heart?

A

“S” shaped

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14
Q

T/F: The atreum start growing at the bottom portion of the heart?

A

True. The heart will then flip and finish growing at the final anatomical area

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15
Q

The area of the developing heart that receives the umbilical, vitelline and common cardinal veins

A

The Sinus

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16
Q

After the hear tube is developed, it elongates and develops dialations and sacculatons to become what four areas?

A

1) Truncus Bulbus (cont. w/ aortic arches
2) Ventricle
3) Atrium
4) Sinus

17
Q

Two acheive the chambers, what two types of tissue formations

A

1) Tissue Growth

2) Tissue Overgrowth

18
Q

Which type of growth involves two tissues approaching each other on the same plane

A

Tissue Growth

19
Q

What structure of the heart is formed via tissue growth

A

The Septum

20
Q

Waht is the atrial septum that is sickle shaped and forms the roof of the atrium

A

Septum Primum

21
Q

What is the opening between the septum primum and the endocardial cushion

A

Ostium Primum

22
Q

What is the opening in the septum primum

A

Ostium Secundum

23
Q

What is the opening in the wall separating the left and right artia and is needed for communication between the two atria

A

The Foramen Ovale

24
Q

the internal shunt is responsible for what?

A

Allows the blood to bypass the lungs

25
Q

T/F: Prenatal closure of the inter-atrial shunt is compatible with life with some deficit

A

False. A premature closure of the inter-atrial shunt is not compatible with life at all

26
Q

What is the condition what effects abotu 25% of the population what the septum primum and secundum do not fuse

A

Probe Patency of the Oval Foramen

27
Q

At what day does the normal “ebb and flow” circulation begin?

A

22nd day

28
Q

When does the heart have a unidirectional flow of blood with the contraction of the heart tube?

A

about the 28th-30th days

29
Q

Oxygenated blood enters the fetus from the placenta via…

A

Veins

30
Q

Deoxygenated blood leaves the fetus via…

A

Arteries

31
Q

The structure that shunts the fetal pulmonary trunk and diverts blood back to eh aorta

A

Ductus Arteriosus

32
Q

The structure in the fetal heart that allows the oxygenated blood to bypass the fetal liver and be shunted to the vena cava…

A

Ductus Venosus

33
Q

What two structures fuse to form the Aoritcopulmonary septum

A

Truncus and Bulbus

34
Q

The structure that opens into the left ventricle

A

Cavum Aorticum

35
Q

The structure that opens into the right ventricle

A

Cavum Pulmonare

Embryology (15 decks)

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