THORAX ABDOMEN AND PELVIS

MEDICAL

HEART AND PERICARDIUM

Please wait while the activity loads.
If this activity does not load, try refreshing your browser. Also, this page requires javascript. Please visit using a browser with javascript enabled.

If loading fails, click here to try again

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

During neonatal circulation, the ductus arteriosus loses it valve ability and becomes the ligamentum arteriosum. The ductus arteriosus help bypass the lungs via connecting which valves?

A	Pulmonary vein and pulmonary artery
B	Aortic Arch and Pulmonary Trunk
C	Brachiocephalic and Pulmonary Trunk
D	Superior Vena Cava and Aortic Arch

Explanation:

Detailed explanation-1: -The ductus arteriosus becomes the ligamentum arteriosum within three weeks of birth, so that deoxygenated blood can be selectively circulated to the lungs for more efficient oxygenation of the blood.

Detailed explanation-2: -The ductus arteriosus is a normal fetal artery connecting the aorta and the main lung artery (pulmonary artery). The ductus allows blood to detour away from the lungs before birth.

Detailed explanation-3: -Around the same time, the placenta is removed from the circulation by the contraction or clamping of the umbilical cord, resulting in a drop in prostaglandin levels. The ductus arteriosus responds to these changes by contracting and closing, ultimately forming the ligamentum arteriosum.

There is 1 question to complete.