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Anatomy CVS Final > lec 8 > Flashcards

lec 8 Flashcards

1
Q

Development of the Circulatory System Appears in

A

the middle of the third week

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2
Q

during middle of the third week

شو وضع الجنين

A

the embryo is no longer able to satisfy its nutritional requirement by diffusion alone

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3
Q

angioblastic blood islands developed from

A

of mesoderm

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4
Q

angioblastic blood islands نفسها

A

angiogenic clusters

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5
Q

angioblastic blood islands appear in

A

yolk sac, chorion and body stalk

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6
Q

When angioblastic blood islands appear

A

During day 18 of gestation

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7
Q

angioblastic blood islands type

A

The innermost cells

The outermost cells

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8
Q

The innermost cells of these blood islands are

A

hematopoietic cells

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9
Q

hematopoietic cells give rise

A

to the blood cell lines.

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10
Q

The outermost cells give rise to

A

the endothelial cell layer of blood vessels

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11
Q

blood islands شو بصيرو

A

blood cells and a plexus of vessels

lying deep to the prospective pericardial cavity

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12
Q

Body-stalk

A

is a band of mesoderm that connects the caudal end of the embryo to the chorion

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13
Q

Cardiac progenitor cells وين بلاقيهم

A

Epiblast ,lateral to the primitive streak

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14
Q

Cardiac progenitor cells migrate from

A

Epiblast through the streak → in the splanchnic layer of the lateral plate
mesoderm ( near the oropharyngeal
membrane and neural folds )

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15
Q

Cardiac progenitor cells انواعهم

A

Cells t form cranial segment of the heart

cells forming more caudal portions of the heart

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16
Q

cranial segment of the heart is

A

the outflow tract

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17
Q

caudal portions of the heart are

A

right ventricle, left

ventricle and sinus venosus.

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18
Q

Cardiac progenitor cells that migrate first,

A

Cells that form cranial segment of the hear

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19
Q

cardiac myoblast from

A

prospective pericardial cavity.

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20
Q

The Epicardium develops from

A

mesodermal cells on the surface of the septum transversum

21
Q

coronary arteries develop from

A

Epicardium

22
Q

small vessels develop into

A

paired horseshoe-shaped endothelial-lined heart tubes surrounded by myoblast

23
Q

myoblast form

A

myocardium

24
Q

myocardium

A

thickens and secretes a thick layer of extracellular matrix, rich in hyaluronic acid that separates it from the endothelium

25
Q

blood islands appear in

A

cardiogenic region

in splanchnic mesoderm

26
Q

blood islands appear close to the midline of the embryonic shield in splanchnic mesoderm forming

A

a pair of longitudinal vessels, the Dorsal

Aortae

27
Q

effect of cephalic folding of the embryo

on neural tube

A
  1. closure of the neural tube
  2. formation of the brain vesicles
  3. the brain extends over the central cardiogenic area and the future pericardial cavity.
28
Q

effect of cephalic folding of the embryo

on the oropharyngeal membrane

A

is pulled forward

29
Q

effect of cephalic folding of the embryo

on heart and pericardial cavity

A

move first to the cervical region and finally

to the thorax.

30
Q

effect of folds laterally heart tubes

A

merge except at their caudalmost ends

forming the hear tube

31
Q

The cranial part of the heart tube expands to form

A

future outflow tract and ventricular regions

32
Q

The heart receives venous drainage at

A

heart caudal pole

33
Q

The heart begins to pump blood out of

A

the first aortic arch into the dorsal aorta at its cranial pole

34
Q

The heart tube remains attached to

A

the dorsal side of the pericardial cavity by a fold of mesodermal tissue

35
Q

Dorsal Mesocardium means

A

The heart tube remains attached to the dorsal side of the pericardial cavity

36
Q

heart tube has

A

No ventral mesentry is formed

dorsal mesentry is formed

37
Q

fate of Dorsal Mesocardium

A

disappears

38
Q

Transverse Pericardial Sinus

A

is formed after disappearing of Dorsal Mesocardium

39
Q

Transverse Pericardial Sinus connects

A

both sides of the pericardial cavity. The heart is now suspended in the
cavity by blood vessels at its cranial and caudal poles.

40
Q

Transverse Pericardial Sinus connects

A

both sides of the pericardial cavity. The heart is now suspended in the
cavity by blood vessels at its cranial and caudal poles.

41
Q

Transverse Pericardial Sinus is formed at day??

A

28 days

42
Q

Heart tube continue to elongate and bend on day

A

23

43
Q

Cephalic portion bendsشقلبي

A

ventrally, caudally and to the right

44
Q

caudal portion bends شقلبي

A

dorsally cranially and to the left.

45
Q

The heart tube is called the Cardiac Loop after

A

شقلبه Cephalic portion and caudal portion

46
Q

The heart tube is called the Cardiac Loop by day day

A

28

47
Q

Cardiac Loop بعد ال formation شو بتكون

A

common atrium and embryonic ventricle

48
Q

common atrium and embryonic ventricle

are connected by

A

narrow Atrioventricular canal

49
Q

The upper cephalic portion of the cardiac loop is called

A

the Bulbus Cordis

Anatomy CVS Final (5 decks)

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