These 10 facts about space will blow your mind. A shoulder cord is a military decoration which is worn on the shoulder. It may loop around the shoulder under the armpit, rest on the shoulder of the uniform, or attach to a point on the front of the uniform, depending on the design.
Methemoglobinemia is a condition in which more than 1% of the hemoglobin in red blood cells takes the form of methemoglobin. Methemoglobulin is an abnormal form of hemoglobin (the molecule responsible for carrying oxygen in the blood cells) that is unable to bind to oxygen. A small amount of methemoglobin is normal (less than 1% of hemoglobin).
Methemoglobinemia is a condition caused by elevated levels of methemoglobin in the blood. Methemoglobin is a form of hemoglobin that contains the ferric [Fe 3+] form of iron. The affinity for oxygen of ferric iron is impaired. The binding of oxygen to methemoglobin results in an increased affinity for oxygen in the remaining heme sites that are in ferrous state within the same tetrameric hemoglobin unit.