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).
Why does carbon monoxide have a greater affinity for hemoglobin than oxygen? Hemoglobin is an iron-containing oxygen transport metalloprotein in the red blood cells of most mammals. Simply put, it's a carrier protein. Interestingly it doesn't carry carbon dioxide in the same way it does for oxygen $\ce{O2}$.