CPR 10 - Heart 2

Question 1

Answer 1

Question 2

What is the cardiogenic mesoderm?

Answer 2

Question 3

Answer 3

Question 4

What/Where does the primordial heart tube develop from?

Answer 4

It develops from the cardiogenic mesoderm in the ventral splanchnic layer

Question 5

Answer 5

Question 6

What does the pericardial coelom become?

Answer 6

Question 7

How does the heart migrate to its proper position in the body?

Answer 7

Question 8

What will the primitive heart tube and surrounding tissue become?

Answer 8

Question 9

Answer 9

Question 10

What is the purpose of the pleuropericardial fold?

Answer 10

To separate the pleural and pericardial spaces and carry the phrenic nerves alongside the pericardium.

Question 11

How does the transverse pericardial sinus form?

Answer 11

Central part of Dorsal mesocardium undergoes apoptosis allowing communication between left and right sides of the pericardium

Question 12

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Question 13

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Question 14

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Question 15

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Question 16

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Question 17

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Question 18

What positions the apex to the left or right?

Answer 18

Question 19

Differentiate dextrocardia from Situs Inversus.

Answer 19

Question 20

What leads to left-right partitioning of all the heart tube structures?

Answer 20

Question 21

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Question 22

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Question 23

List the steps to atrial partioning

Answer 23

Question 24

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Question 25

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1.

Question 26

What happens to the righ and left horns of the sinus venosus?

Answer 26

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

Question 27

Discuss how the LA and oblique pericardial sinus develops.

Answer 27

Question 28

Describe how the foramen ovale closes and what is left over once it does.

Answer 28

Question 29

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Question 30

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Question 31

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Question 32

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Question 33

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Question 34

What divides the primordial ventricle into left and right parts? What happens with this structure later in development?

Answer 34

Question 35

What does the bulcus cordis become? How does this happen?

Answer 35

Question 36

After the ventricular outflow tracts have been formed, where do they lead and what does this are develop into? How?

Answer 36

Question 37

What forms the membranous part of the IV septum?

Answer 37

Question 38

What does the truncus arteriosus develop into and how?

Answer 38

Question 39

From what do the AV valves form?

Answer 39

Question 40

From what do the semilunar valves develop and how?

Answer 40

Question 41

What is the most common of all congenital heart defects? What usually causes it?

Answer 41

Question 42

What is the role of neural crest cells in heart development?

Answer 42