Hemoglobin has a peroxidase-like activity, meaning that it will break down hydrogen peroxide, or other organic hydroperoxides. This makes it useful in forensics, since you can test for the presence of hemoglobin simply by dropping hydrogen peroxide on it. Of course, there are a lot of things that have peroxidases in them, so this is a presumptive test for the presence of blood.
Blood cells are not immortal; each cell wears out in about four months, and will disintegrate in the blood stream, leaving behind bits and pieces of dead cells. The spleen gathers the dead cell pieces, and will filter the blood to remove any malfunctioning blood cells that haven't died yet. This short life span necessitates the constant production of red blood cells,
Blood cells are not immortal; each cell wears out in about four months, and will disintegrate in the blood stream, leaving behind bits and pieces of dead cells. The spleen gathers the dead cell pieces, and will filter the blood to remove any malfunctioning blood cells that haven't died yet. This short life span necessitates the constant production of red blood cells,