Definition: Asconoid is a type of heart valve that is located in the right atrium, also known as the "aspen" or "heart spring," and it plays a crucial role in regulating blood flow to the lungs. The Asconoid is responsible for opening when the heart rate increases, allowing oxygenated blood to enter the lungs, while closing when the heart rate decreases, preventing the return of oxygenated blood back into the body. This function is essential for maintaining an adequate supply of oxygen