Cardiac embryology Flashcards Preview

Anatomy Cards with Pics > Cardiac embryology > Flashcards

Flashcards in Cardiac embryology Deck (20):
1

Where is the cardiogenic region?

Visceral layer of the lateral plate mesoderm

2

What do the angiogenic clusters form?

Endocardial tubes and dorsal aortae

3

What does lateral folding do to the heart?

Bring endocardial tubes together to form single heart tube

4

What does longitudinal folding do to the heart?

Moves endocardial tubes to thoracic region (dorsal to pericardial cavity)

Also fuses the dorsal aortae ventrally

5

What does the bulbis cordis become?

1. Right ventricle

2. Conus cordis (root of aorta)

3. Truncas arteriosus (pulm trunk)

6

What is the aortico-pulmonary septum? What defect occurs when it fails to form

Septum of the truncas arteriosus makes divsion between aorta and pulmonary trunk

Tetraology of fallot: Ventricular septal defect, Pulmonary stenosis, RV hypertrophy, Over-riding aorta

7

What three veins drain into the sinus venosus?

1. cardinal veins (all over body)

2. vitelline veins (blookd from yolk sac)

3. umbilical veins (oxygenated blood from placenta)

8

What do the vitelline veins become

Ductas venosus

9

What do the right and left horns of the sinus veonsus become?

Right: expands to IVC, SVC, and atrial wall

Left: coronary sinus at AV groove

10

What is the cristae terminalis?

separates smooth and rough muscle of RA

11

Where does the smooth muscle of RA come from? Rough muscle?

smooth: veins (sinus venosus and pulmonary vein)

rough: primitive atrium

12

What becomes the auricles?

Primitive atrial wall

13

What fuses to become the 1st aortic arch?

truncas arteriosus and dorsal aortae

14

What does the 4th aortic arch become in asymmetric remodeling?

Right: right subclavian artery

Left: aortic arch

15

What does the 6th aortic arch become in asymmetric remodeling?

Right: disappears

Left: Ductas arteriosus

Proximal: Pulmonary arteries

16

Where do the lymphatic come from?

Endothelium of the veins

17

What are the three shunts in fetal circulation and what do they connect?

1. foramen ovale from atrial separation: connect two atria

2. ductus arteriosus from left 6th aortic arch: connect pulm trunk with descending aorta

3. ductus venosus from vitelline veins: bypass the liver

18

What do the fetal shunts become at birth?

1. foramen ovale -> fossa ovalis

2. ductus arteriosus -> ligamentum arteriosum

3. ductus venosus -> ligamentum venosum

19

Where does the membranous septum of the endocardial cushion come from?

Neural crest cells

20

Where does the right pumonary artery travel? Left pulmonary artery?

Left: anterior to aorta

Right: posterior to aorta and SVC