Cardiac Embryology Quiz

What happens during cardiac embryology at week 7?

• Remnant of septum primum acts as flap at Foramen Ovale & controls blood flow between atria

• At birth, LAP increases forcing septum primum against from the septum secundum closing FO (Foramen Ovale)

• The coronary sinus is formed

• The heart begins to beat

What are the 3 layers of the fetal heart?

• Epicardium, Myocardium, Endocardium

• Pericardium, Myocardium, Endocardium

• Epicardium, Pericardium, Endocardium

• Pericardium, Myocardium, Epicardium

What is the bulbus cordis of the fetal heart?

• Forms the right ventricle and parts of the outflow tract for the aorta and pulmonary trunk

• Forms the left ventricle and parts of the outflow tract for the aorta and pulmonary trunk

• Forms the right atrium and parts of the outflow tract for the aorta and pulmonary trunk

• Forms the left atrium and parts of the outflow tract for the aorta and pulmonary trunk

What is a Chiari network?

• An embryologic remnant of the valves of the sinus venosus which appears as a web-like structure with a variable number of thread-like components

• A network of nerves in the heart

• A network of blood vessels in the heart

• A network of muscle fibers in the heart

What is a eustachian valve?

• An embryologic remnant of the IVC in the RA

• A valve in the ear

• A valve in the aorta

• A valve in the pulmonary artery

What is moderator band?

• Band like structure in the RV passing from the IVS to the free wall of the RV

• Band like structure in the LV passing from the IVS to the free wall of the LV

• Band like structure in the RA passing from the IVS to the free wall of the RA

• Band like structure in the LA passing from the IVS to the free wall of the LA

How many tubes does the heart begin with in week 1 of cardiac embryology?

• 2

• 1

• 3

• 4

What is the left and right sinus horn?

• Both horns of the sinus venosus

• Both horns of the sinus arteriosus

• Both horns of the sinus atrium

• Both horns of the sinus ventricle

What is a foramen ovale?

• A) A passageway for blood to enter the left atrium from the right atrium

• B) A passageway for blood to enter the right atrium from the left atrium

• C) A valve that prevents blood from entering the left atrium

• D) A valve that prevents blood from entering the right atrium

What is a ductus arteriosus?

• A) Most of the blood is bypassed or shunted away from the lungs through the ductus arteriosus to the aorta

• B) Most of the blood is bypassed or shunted away from the lungs through the ductus arteriosus to the left atrium

• C) Most of the circulation to the lower body is supplied by blood passing through the ductus arteriosus

• D) Most of the circulation to the upper body is supplied by blood passing through the ductus arteriosus