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What are these white areas of coronary thrombosis?

Please, see the picture where the areas (1,2,3) look little yellow: I think these areas are fat, platelets and/or air. I think 3 is fat/platelets while 1 is air/platelets. There also exists white ...
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Iron deficiency anemia symptoms explanation

In my classes and on the internet, brittle nails and dry hair (or hair loss) are described as symptoms of iron deficiency anemia, but none explains the cause of such symptoms. Does anyone have any ...