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the ligamentum arteriosum develops from the ductus arteriosis in the fetus/embryo. the ductus arteriosis is a bypass mechanism where blood is not transported to the lungs as they are not yet functional. after birth lungs are necessary (nolonger a placenta for oxygen) so ductus arteriosum closes up and becomes the ligamentum arteriosum
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What is the function of ligamentum arteriosum?
It is the remnant of ductus arteriosus a blood vessel which bypassed the blood to the heart in foetus as the lungs are not functioning till the child is born. After birth once the lungs start functioning, it starts to close and is completely closed by second month.
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