ID Organ # of Organ-specific Genes 1 adipose 27 2 adrenal gland 45 3 amnion 71 4 bladder 71 5 blood 110 6 blood vessel 549 7 bone 53 8 bone marrow 122 9 brain 369 10 breast 96 11 cervix 45 12 colon 107 13 ear 78 14 embryo 70 15 esophagus 68 16 eye 199 17 gallbladder 11 18 ganglia 17 19 heart 85 20 kidney 191 21 larynx 108 22 leiomios 61 23 liver 195 24 lung 115 25 lymph 189 26 lymph node 228 27 mouth 178 28 muscle 112 29 nerve 181 30 ovary 96 31 pancreas 161 32 parathyroid gland 114 33 peritoneum 2 34 pharynx 137 35 pituitary 27 36 placenta 232 37 prostate 144 38 rectum 27 39 salivary gland 115 40 skin 108 41 small intestine 41 42 spinal cord 6 43 spleen 156 44 stomach 123 45 testis 773 46 thymus 206 47 thyroid 78 48 tonsil 109 49 trachea 214 50 umbilical cord 85 51 ureter 2 52 uterus 30