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Question

Pylangium in frog occurs in

A
Conus arteriosus
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B
Sinus venosus
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C
Atrium
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D
Ventricle
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Solution

The correct option is B Conus arteriosus
The truncus arteriosus is formed of a basal thick-walled conus arteriosus and a distal thin-walled ventral aorta. Its conus arteriosus part which is next to the ventricle is known as pylangium and the distal ventral part as synangium. Pylangium is a short tubular structure, while synangium is simply formed by the union of the basal parts of the arteries.
So the correct answer is 'Conus arteriosus'.

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