CVS EMBRYO Flashcards
What is the embryonic dilatation that corresponds to the adult structure of the truncus arteriosus?
Proximal part of aorta and proximal part of pulmonary artery
What embryonic structure gives rise to the smooth part of the right ventricle?
Bulbus cordis
Name the embryonic structure that forms the trabeculated part of the left ventricle.
Primitive ventricle
The smooth part of the left atrium is derived from which embryonic structure?
Primitive atrium
What is the origin of the superior vena cava?
Right anterior cardinal vein & right common cardinal vein
What segments make up the inferior vena cava?
- Hepatic segment
- Prerenal segment
- Renal segment
- Postrenal segment
The hepatic segment of the inferior vena cava is derived from which embryonic structures?
Hepatic vein & sinusoids
What is the embryonic origin of the renal segment of the inferior vena cava?
Sub-supracardinal anastomosis
The left fourth aortic arch develops into which adult structure?
Arch of aorta
What does the right sixth aortic arch give rise to?
Right pulmonary artery
True or False: The ductus arteriosus is derived from the left sixth aortic arch.
True
During the 3rd week of development, which cells contribute to the formation of the nervous system?
Ectodermal cells
What is the outcome of the perforations in the septum primum before the closure of the foramen primum?
Formation of the foramen secundum
The ostium secundum is found in which structure?
Septum primum
What causes an atrial septal defect (ASD)?
Incomplete fusion of the endocardial cushions
What contributes to the smooth part of the right atrium?
Sinus venosus
The coronary sinus drains blood from where into the right atrium?
Cardiac veins
The left auricle is derived from which embryonic structure?
Primitive atrium
What regulates blood flow into the right atrium?
Thebesian valve
What is the function of vasculogenesis?
Forms vessels de novo
What does the ductus venosus bypass in fetal circulation?
Liver
Fill in the blank: The foramen ovale allows blood to bypass the _______.
Lungs
What happens immediately after birth to the ductus arteriosus and foramen ovale?
They close to establish neonatal circulation
What is the remnant of the closed foramen ovale?
Fossa ovalis
What is a characteristic of transposition of the great vessels?
Aorta arises from the right ventricle
What are the components of Tetralogy of Fallot?
- Overriding aorta
- Pulmonary stenosis
- Right ventricular hypertrophy
- Ventricular septal defect
What is the most common positional anomaly of the heart?
Dextrocardia
What is used to confirm cardiomegaly in suspected cardiac enlargement?
Chest X-ray
True or False: A patent foramen ovale may be identified during clinical examination.
True
