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When social costs for using a scarce resource are included, then there is
Tissue Plasminogen Activator
An enzyme that helps dissolve blood clots by converting plasminogen into plasmin, used in the treatment of stroke and other clotting conditions.
Foramen Ovale
An opening in the heart's atrial septum present in the fetus, which normally closes soon after birth.
Pulmonary Trunk
The major blood vessel that carries blood from the right ventricle of the heart to the lungs for oxygenation.
Aortic Semilunar Valve
A valve in the heart located between the left ventricle and the aorta that prevents blood from flowing back into the heart.
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