| http://www.w3.org/ns/prov#value | - eat ??? ??? ??? pathogen any disease-producing agent (especially a virus or bacterium or other microorganism) ??? ??? ??? platelets tiny, disk-shaped bodies in the blood, important in blood clot formation ??? ??? ??? pericardium membranous sac enclosing the heart ??? ??? ??? pulmonary vein any of four veins that carry arterial blood from the lungs to the left atrium of the heart ??? ??? ??? recipi
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