EXPLAIN CLEARLY WHAT ARE FORAMEN OVALE AND DUCTUS ARTERIOSUS

Foramen ovale is present in fetal heart. It allows the blood to enter the left atrium from the right atrium. It closes at birth and later forms fossa ovalis. Ductus arteriosus is a blood vessel in fetal heart which connects pulmonary artery to the proximal descending aorta. It also closes at birth forming ligamentum arteriosum.