red blood cell that is d like a teardrop

organ red circle orange lighting light dacrocyte dacryocyte type poikilocyte shaped like teardrop rendering blood cell dacrocyte dacryocyte poikilocyte red bleeding blood cardiology cardiovascular cell cells artery abnormal abnormality tear drop teardrop vascular vein vessel anatomy biology coronary disease flow flowing genetic health healthy human illness magnification medical medicine pinched pitting platelet research science scientific shape sickness tailed 3d