CPR 10 - Heart 2 Flashcards
What is the cardiogenic mesoderm?
What/Where does the primordial heart tube develop from?
It develops from the cardiogenic mesoderm in the ventral splanchnic layer
What does the pericardial coelom become?
How does the heart migrate to its proper position in the body?
What will the primitive heart tube and surrounding tissue become?
What is the purpose of the pleuropericardial fold?
To separate the pleural and pericardial spaces and carry the phrenic nerves alongside the pericardium.
How does the transverse pericardial sinus form?
Central part of Dorsal mesocardium undergoes apoptosis allowing communication between left and right sides of the pericardium
What positions the apex to the left or right?
Differentiate dextrocardia from Situs Inversus.
What leads to left-right partitioning of all the heart tube structures?
List the steps to atrial partioning
1.
What happens to the righ and left horns of the sinus venosus?
Right Horn - it enlarges and becomes absorbed into the RA to become the sinus venarum, the smooth-walled part of the RA where the SVC and IVC enter
Left Horn - becomes the coronary sinus, which empties into the right atrium
Discuss how the LA and oblique pericardial sinus develops.
Describe how the foramen ovale closes and what is left over once it does.
What divides the primordial ventricle into left and right parts? What happens with this structure later in development?
What does the bulcus cordis become? How does this happen?
After the ventricular outflow tracts have been formed, where do they lead and what does this are develop into? How?
What forms the membranous part of the IV septum?
What does the truncus arteriosus develop into and how?
From what do the AV valves form?
From what do the semilunar valves develop and how?
What is the most common of all congenital heart defects? What usually causes it?
What is the role of neural crest cells in heart development?
