SCIENCE
ZOOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a sinus venosus
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b Truncus arteriosus
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Either A or B
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None of the above
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Detailed explanation-1: -The vessel is called the truncus arteriosus. It usually splits in two as the baby grows in the womb. One part becomes the lower end of the body’s main artery, called the aorta. The other part becomes the lower part of the pulmonary artery.
Detailed explanation-2: -Persistent truncus arteriosus (TA) is a rare, congenital, cyanotic heart defect characterized by a ventricular septal defect (VSD), a single truncal valve, and a common ventricular outflow tract (OT).
Detailed explanation-3: -In hearts with a common arterial trunk (truncus arteriosus), there is almost always an inverse development of the aortic arch and the ductus arteriosus. Truncus with a normal aortic arch and a patent ductus is a rare echocardiographic and surgical finding.
Detailed explanation-4: -A1-short main pulmonary artery segment arises from truncus then bifurcates into pulmonary arteries (same as Collett and Edwards type I) A2-pulmonary arteries arise separately from posterior truncus. A3-one pulmonary artery arises on the truncus and another is supplied by a duct. More items