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Flashcards in Development of the Heart Deck (61)
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1

The ________is the first to develop and function within the developing fetus.

heart

2

Where does oxygenated blood to the fetus come from ?

placenta

3

Where do the cardiac precursor cells migrate into to form the primary heart field ?

splanchnic mesoderm

4

The heart initially consists of what types of cells ?

endothelium and splanchnic mesoderm

5

What are the two layers the splanchnic mesoderm develops into ?

myocardium and cardiac jelly

6

cells from the splanchnic mesoderm also migrate and give rise to what ?

epicardium

7

What are the three layers of the cardiac tube ?

epicardium, myocardium and endocardium

8

cardiac looping is complete by what day ?

day 28

9

The bulbus cordis helps give rise to what structures

trabeculated right ventricle, conus cordis (outflow tract), and truncus arteriosis

10

The ventricle gives rise to what

left and right ventricle

11

the atrium gives rise to

trabeculated right and left atria

12

the sinus venosus helps give rise to

smooth part of right atrium

13

The sinus venosus receives blood from

vitelline (yolk sac); umbilical (placenta) and common cardinal (embryo)

14

What happens during Week 5

there is a great venous shift to the right and the right venous horn increases in size and the left becomes unimportant

15

What does the right venous hour contribute to?

inferior vena cava

16

Between the conus cordis and the truncus the endocardial cushions are from

neural crest cells and serve to partition the truncus

17

between the atria and the ventricle the endocardial cushions are from

splanchnic mesoderm and partition the atria, ventricles and AV canals

18

what helps form the foramen ovale

septum primum

19

What type of tissue forms the AV valves

mesenchymal tissue

20

the primitive ventricle forms

most of the left ventricle and parts of the right and the interventricular septum

21

the bulbus cordis forms

most of the right ventricle

22

the truncus ateriosus forms

infundibulum (conus arteriousus) and aortic vestibule

23

What help partition the conus cordis and truncus arteriosus

neural crest cells

24

initially the pacemaker is located where

caudal left cardiac tube

25

Cells from what and the AV canal form the AV node and bundle branches

sinus venosus

26

what day does the heart beat show up

day 30

27

The ductus arteriosus is found in adults as

ligamentum ateriosus

28

The cardiac precursors cells arise from what ?

epiblast

29

The __________induces the cardiac precursor cells once they have migrated to form cardiac myoblasts

endoderm

30

coelomic epithelium help to form what

myocardium and conducting system