What is the role of ductus arteriosus in bird’s circulatory system?

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The ductus arteriosus is a crucial component in the circulatory system of avian species. In birds, the ductus arteriosus serves as a temporary bypass vessel that plays a pivotal role in directing blood flow while the bird is still in the egg and after hatching until the full development of the pulmonary system.

During embryonic development in birds, the lungs are non-functional and collapsed, and gas exchange primarily occurs through the eggshell. As a result, the blood circulation bypasses the lungs. The ductus arteriosus serves as a shunt, allowing blood to skip the pulmonary circulation by connecting the pulmonary artery ____ _____________ ____________ __________ _______ ____.
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Degree : BACHELOR DEGREE PROGRAMMES
Course Name : Bachelor of Science
Course Code : BSCG
Subject Name : Comparative Anatomy and Developmental Biology of Vertebrates
Subject Code : BZYCT 133
Year : 2022