Embryology of the Heart Flashcards
What adult structure forms from the truncus asteriosus?
Aorta & Pulmonary Trunk
What adult structure forms from the bulbus cordis?
Smooth parts of the right and left ventricles
What adult structure forms from the primitive ventricle?
The trabeculated parts of the right and left ventricles.
What adult structure forms from the primitive atrium?
The trabeculated parts of the right and left atria.
What adult structure forms from the sinus venosus?
Smooth part of right atrium
coronary sinus
oblique vein of the left atrium
What are the features of tetralogy of fallot?
PROVe
- Pulmonary stenosis - stenosis of the pulmonary valve
- Right ventricular hypertrophy - thickening of right ventricle muscle due to increased pressure in the heart
- Overriding Aorta - aorta receives from the right and left ventricles
- Ventricular septal defect (VSD) - septum not fully developed to separate the right and left ventricles
Marked cyanosis!!!
What is the adult remnant of the right and left umbilical arteries?
The medial umbilical ligament
What is the adult remnant of the left umbilical vein?
The ligamentum teres (AKA round ligament of the liver)
What is the adult remnant of the ductus venosus?
The Ligamentum venosum
What is the adult remnant of the foramen ovale?
The fossa ovale
What is the adult remnant of the ductus arteriosus?
The ligamentum arteriosum.
Complete this sentence: Umbilical arteries carry _____________________________.
Umbilical arteries carry deoxygenated blood AWAY from the fetus
Complete this sentence: Umbilical veins carry _____________________________.
Umbilical veins carry oxygenated blood TOWARD the fetus
What is the foramen ovale?
Shunt that connects the left and right atria, moving blood from the superior vena cava into the right atrium, directly to the left atrium, and out of the aorta for systemic circulation.
What is the ductus venosus?
Reroutes oxygenated blood returning from the placenta via the umbilical vein to the inferior vena cava to prevent the liver from taking oxygen meant for the rest of the body
What is the ductus arteriosus?
Shunts leftover blood from the pulmonary trunk directly to the aorta.
What is the blood supply from aortic arch 3 to pharyngeal arch 3?
Aortic arch 3 gives the common carotid artery and most of the internal & external carotids.
Right and left aortic arches are the same!!
What is the blood supply from aortic arch 4 to pharyngeal arch 4?
Arch 4 - right and left are different!!
Right: gives the right subclavian
Left: shares in the formation of arch of the aorta
Thus, the recurrent branch of the Vagus recurs around the right subclavian and the left aorta
What is the blood supply from aortic arch 6 to pharyngeal arch 6?
Arch 6-right and left are different!!!
Right: gives the Right pulmonary artery
Left : Ductus arteriosus and Left Pulmonary Artery
