USMLE Forum Archives - USMLE Step 1 - EMBRYO
EMBRYO
drspleen - 03-16-11 14:47
A mother delivers a set of twins approximately 2 months preterm. One infant is noted to have a defect in his coronary sinus. Which of the following primitive structures develop into the coronary sinus?
* A. Right horn of the sinus venosus
* B. Right common cardinal vein
* C. Truncus arteriosus
* D. Bulbous cordis
* E. Left horn of the sinus venosus
drspleen - 03-16-11 14:47
A mother delivers a set of twins approximately 2 months preterm. One infant is noted to have a defect in his coronary sinus. Which of the following primitive structures develop into the coronary sinus?
* A. Right horn of the sinus venosus
* B. Right common cardinal vein
* C. Truncus arteriosus
* D. Bulbous cordis
* E. Left horn of the sinus venosus
The correct answer and explanation will be available after you answer.
Page 1
#1
Re: EMBRYO babbu5508 - 03-19-11 13:23 My answer is: e.
This sinus receives most of the venous blood from the heart and empties into the right atrium. Its tributaries are the small cardiac vein, the middle cardiac vein and the greater cardiac vein.
Page 1