Embryology

Question 0

What does cephalocaudal folding achieve in terms of the developing heart?

Answer 0

Brings the tube into the thoracic region

Question 1

What does lateral folding achieve in terms of the developing heart?

Answer 1

Creates a heart tube

Question 2

What are the precursors of the heart tube?

Answer 2

Endocardial tubes

Question 3

What are the regions of the primitive heart tube from caudal to cranial?

Answer 3

Sinus venosus - atrium - ventricle - bulbous cordis - truncus arteriosus - aortic roots

Question 4

When does lopping occur with regards to the developing hearts?

Answer 4

Begins day 23, completes day 28

Question 5

How does looping proceed with regards to the developing heart?

Answer 5

Cephalic portion moves centrally, caudally and to the right (forward, downwards, right)
Caudal portion moves dorsally, cranially and to the left (backwards, upwards, left)

Question 6

What does looping produce in terms of developing heart?

Answer 6

Transverse pericardial sinus (arteries in front of veins)

Question 7

After looping how does the atrium communicate with the ventricle?

Answer 7

Via atrioventricular canal