Development of Cardiovascular System MCQ Quiz | Embryology

Welcome to the quiz on the Development of the Cardiovascular System. This module is a cornerstone of embryology, crucial for understanding congenital heart diseases. This quiz features 25 multiple-choice questions designed for MBBS students to test and reinforce their knowledge on topics like heart tube formation, cardiac looping, septation, aortic arch derivatives, and fetal circulation. Carefully read each question and select the best possible answer. After submitting, you’ll see your score and a detailed review of the correct and incorrect answers. For your future reference and revision, you can download all the questions and their correct answers as a PDF file using the download button that appears after submission.

1. The primordial heart tubes, which fuse to form the single heart tube, are derived from which germ layer?

2. In the early embryo, the primary cardiogenic area is initially located where?

3. The normal looping of the primitive heart tube is a crucial process. What is the typical direction of this looping?

4. The right horn of the sinus venosus gives rise to which structure in the adult heart?

5. During atrial septation, the foramen secundum is an opening that develops via apoptosis in which structure?

6. The fossa ovalis in the adult interatrial septum is a remnant of the:

7. The atrioventricular (AV) septum, which separates the atria from the ventricles, is primarily formed from the fusion of what structures?

8. The muscular part of the interventricular septum is derived from the:

9. Complete failure of the conotruncal (aorticopulmonary) septum to spiral 180 degrees during development results in which major congenital anomaly?

10. The smooth-walled outflow tract of the left ventricle, known as the aortic vestibule, is derived from which part of the primitive heart tube?

11. The third pair of aortic arch arteries gives rise to which of the following adult vessels?

12. The left fourth aortic arch artery develops into which major adult vessel?

13. The distal part of the left sixth aortic arch artery persists in postnatal life as the:

14. In the fetal circulation, the primary site of oxygen and nutrient exchange is the:

15. The ductus venosus is a critical fetal shunt that allows highly oxygenated blood from the umbilical vein to bypass the hepatic sinusoids and flow directly into the:

16. The foramen ovale in the fetal heart permits blood to flow from the:

17. The ductus arteriosus connects which two vessels in the fetus, shunting blood away from the non-functional lungs?

18. What is the primary physiological stimulus for the functional closure of the foramen ovale immediately after birth?

19. The vitelline veins, which drain the yolk sac, remodel to form a significant part of which adult venous system?

20. In the developing embryo, the posterior cardinal veins, which drain the trunk, are largely replaced by which two venous systems?

21. The superior vena cava (SVC) is primarily formed from which embryonic veins?

22. Persistent truncus arteriosus is a congenital heart defect resulting from the failure of the development of the:

23. Which of the following is NOT a classic component of the Tetralogy of Fallot?

24. The endocardium, the inner lining of the heart chambers, is derived from which layer of the primitive heart tube?

25. The sinoatrial (SA) node, the primary pacemaker of the heart, develops within the wall of which embryonic structure?