atrial (adjective)

1. During the medieval period, medical practitioners had limited knowledge about atrial anatomy and function.

2. The artist's portrayal of the atrial chamber in their painting showcased their attention to detail and anatomical accuracy.

3. The architect integrated large atrial spaces into the design of the building, allowing for natural light to illuminate the interior.

4. In the novel, the protagonist's heart was described as having a congenital defect in the atrial chamber.