THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -The ductus arteriosus is a vessel connecting the pulmonary trunk and the aortic arch or descending aorta in the fetus. While this is a vestigial structure in an adult, during fetal development, the ductus arteriosus’ function is to bypass the lungs.

Detailed explanation-2: -During fetal development, the ductus arteriosus serves as a shunt between the pulmonary artery and the aorta.

Detailed explanation-3: -What is the Ligamentum Arteriosum? The ligamentum arteriosum is a fibrous remnant of a part of fetal development, the ductus arteriosus. The ductus arteriosus is a vessel that connects the pulmonary trunk and the descending aorta in a developing fetus that functions to bypass the lungs.