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Question: Answered & Verified by Expert
A thin, muscular wall (oval depression) in the heart is seen  
BiologyBody Fluids and CirculationNEET
Options:
  • A Inter-atrial septum
  • B Inter-ventricular septum
  • C Right auriculo-ventricular septum
  • D Left auriculo-ventricular septum
Solution:
2765 Upvotes Verified Answer
The correct answer is: Inter-atrial septum
An oval depression called fossa ovalis is present in the inter auricular septum within the right auricle. Through this foramen, the blood from the right auricle is communicated towards the left auricle in the embryo. Over the course of several months, the foramen ovale closes, leaving a shallow depression known as the fossa ovalis in the adult heart.

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