Did you know some people have green blood.

SULFHEMOGLOBINEMIA is a condition where a person develops green blood.                                                                                       In 2007, surgeons operating on a 42- years old Canadian man got a shock when they discovered dark - green blood coursing through his arteries.                                                                                                                    Stunned, the medical team immediately sent his blood for analysis the test the blood discoloration was caused by sulfaemoglobinemia, which occurs when a sulphur atom gets incorporated into the oxygen-carrying haemoglobin protein in blood.