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Question
In an embryo, the blood vessel between pulmonary trunk and aorta is called
In an embryo, the blood vessel between pulmonary trunk and aorta is called
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Solution
The correct option is C ductus arteriosus
In the embryo, there is a small blood vessel that connects the lumen of the pulmonary trunk and the aorta. The connecting channel is known as the ductus arteriosus. This duct gets closed at the time of birth and only a ligament remains as a part of that which is attached to both the arches at their crossing point. This remnant of ductus arteriosus in adults is called ligamentum arteriosum.
Foramen ovale is the opening of the right atrium into the left atrium which is present only in the foetal stage. At this stage the lungs are non-functional, so the blood circulation is by-passed and blood reaches the left atrium directly from the right atrium through foramen ovale. At the time of birth, foramen ovale gets closed and leaves an oval depression there which is known as fossa ovalis.
In the embryo, there is a small blood vessel that connects the lumen of the pulmonary trunk and the aorta. The connecting channel is known as the ductus arteriosus. This duct gets closed at the time of birth and only a ligament remains as a part of that which is attached to both the arches at their crossing point. This remnant of ductus arteriosus in adults is called ligamentum arteriosum.
Foramen ovale is the opening of the right atrium into the left atrium which is present only in the foetal stage. At this stage the lungs are non-functional, so the blood circulation is by-passed and blood reaches the left atrium directly from the right atrium through foramen ovale. At the time of birth, foramen ovale gets closed and leaves an oval depression there which is known as fossa ovalis.
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