embryology

Question 1

What are the 5 parts of the primitive heart (superior to inferior)?

Answer 1

truncus arteriosus
bulbus cordis
primative ventricle
primative atrium
sinus venosis

Question 2

What does the truncus arteriosus give rise to?

Answer 2

ascending aorta and the pulmonary trunk

Question 3

What does the bulbus cordis give rise to?

Answer 3

distal bulbus cordus:
outflow tracts of ventricles

proximal bulbus cordis:
right ventricle

Question 4

What does the primative ventricle give rise to?

Answer 4

left ventricle

Question 5

What does the primative atrium give rise to?

Answer 5

rough parts of right and left atrium

Question 6

What does the sinus venosus give rise to?

Answer 6

sinus venarum

Question 7

What 3 structures make up the ventricular septum?

Answer 7

muscular portion:
- ventricle muscles

membranous:

• endocardial cushions
• trunco-conal septum

Question 8

What makes up the floor of the fossa ovalis? the limbus fossa ovalis?

Answer 8

septum primum

septum secundum

Question 9

What creates the AV valves?

Answer 9

endocardial cushions

Question 10

What does the left common cardinal become?

Answer 10

coronary sinus

Question 11

What is precardinal anastomosis?

Answer 11

The act of the left precardinal vein anastomosing with the right precardinal vein forming the L. brachiocephalic vein

Question 12

What creates the ductus venosus?

Answer 12

left umbilical vein and the the right vitelline vein