Flashcards in Development of the Heart Deck (61)
The ________is the first to develop and function within the developing fetus.
Where does oxygenated blood to the fetus come from ?
Where do the cardiac precursor cells migrate into to form the primary heart field ?
The heart initially consists of what types of cells ?
endothelium and splanchnic mesoderm
What are the two layers the splanchnic mesoderm develops into ?
myocardium and cardiac jelly
cells from the splanchnic mesoderm also migrate and give rise to what ?
What are the three layers of the cardiac tube ?
epicardium, myocardium and endocardium
cardiac looping is complete by what day ?
The bulbus cordis helps give rise to what structures
trabeculated right ventricle, conus cordis (outflow tract), and truncus arteriosis
The ventricle gives rise to what
left and right ventricle
the atrium gives rise to
trabeculated right and left atria
the sinus venosus helps give rise to
smooth part of right atrium
The sinus venosus receives blood from
vitelline (yolk sac); umbilical (placenta) and common cardinal (embryo)
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
What does the right venous hour contribute to?
inferior vena cava
Between the conus cordis and the truncus the endocardial cushions are from
neural crest cells and serve to partition the truncus
between the atria and the ventricle the endocardial cushions are from
splanchnic mesoderm and partition the atria, ventricles and AV canals
what helps form the foramen ovale
What type of tissue forms the AV valves
the primitive ventricle forms
most of the left ventricle and parts of the right and the interventricular septum
the bulbus cordis forms
most of the right ventricle
the truncus ateriosus forms
infundibulum (conus arteriousus) and aortic vestibule
What help partition the conus cordis and truncus arteriosus
neural crest cells
initially the pacemaker is located where
caudal left cardiac tube
Cells from what and the AV canal form the AV node and bundle branches
what day does the heart beat show up
The ductus arteriosus is found in adults as
The cardiac precursors cells arise from what ?
The __________induces the cardiac precursor cells once they have migrated to form cardiac myoblasts