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The ductus arteriosus usually closes within 24 hours of birth and is obliterated anatomically in 1-8 weeks.
Near the prostate gland, the ductus is enlarged to form the ampulla; immediately thereafter, it is joined by the duct from the seminal vesicle.
The duct contained in the ring joins the ductus pancreaticus near the duodenum.
ductus venosus
The pulmonary artery - which, after birth, will carry blood from the heart to the lungs - instead sends blood directly back to the heart through a fetal blood vessel called the ductus arteriosus.
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