Poll Results

Total votes: 3618

Spleen: 1973 (54.5%)
Brain: 310 (8.6%)
Hypothalamus: 255 (7.0%)
Pancreas: 242 (6.7%)
Appendix: 239 (6.6%)
Bladder: 174 (4.8%)
Gall bladder: 125 (3.5%)
Thyroid: 70 (1.9%)
Liver: 51 (1.4%)
Kidney: 46 (1.3%)
Large intestine: 38 (1.1%)
Stomach: 38 (1.1%)
Small intestine: 23 (0.6%)
Lung: 18 (0.5%)
Heart: 16 (0.4%)

That's pretty definitive!