Blood is extremely dangerous when carried to the blood via the lungs by inhalation, because carbon monoxide irreversibly binds to hemoglobin to form carboxyhemoglobin, so that less hemoglobin is free to bind oxygen, and fewer oxygen molecules can be transported throughout the blood. This can cause suffocation insidiously. A fire burning in an enclosed room with poor ventilation presents a very dangerous hazard, since it can create a build-up of carbon monoxide in the air. Some carbon monoxide binds to hemoglobin when smoking tobacco. Blood for transfusion is obtained from human donors by blood donation and stored in a blood bank.
Hemoglobin D-Punjab the body. Normal red blood cells have hemoglobin A. People with hemoglobin D trait have red blood cells that have normal hemoglobin A and an abnormal hemoglobin. The abnormal hemoglobin is called hemoglobin D..http://www.stjude.org/stjude/v/index.jsp?vgnextoid=30f0db6324d6f110VgnVCM1000001e0215acRCRD Among the seven known types of Hemoglobin D, only Hemoglobin D Punjab can cause a serious hemoglobin disorder. While Hemoglobin D can be detected without a DNA test, one is needed to ascertain that a person who carries Hemoglobin D carries hemoglobin D-Punjab. A single mutation in the HBB gene is called Hemoglobin D Trait. There is no clinical disease detected, however children of affected individuals