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Hematologia


   Virusul HIV ataca anumite tipuri de globule albe ( limfocitele T CD4+) care fac parte din sistemul imunitar. Pe masura ce sistemul imunitar incepe sa slabeasca, globulele albe devin incapabile sa opuna rezistenta impotriva bolilor si de a lupta impotriva germenilor. Germenii care in mod normal ar fi rapid neutralizati, raman in organism si se inmultesc.




BioDigital Systems created this 3D animation to show how a heart attack occurs.



The heart is fundamentally a blood pump. It pumps blood from the right side of the heart to the lungs to pick up oxygen. The oxygenated blood returns to the left side of the heart. The left side of the heart then pumps blood into the circulatory system of blood vessels that carry blood throughout the body.


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