Each subunit contains an iron containing pigment (heme) and a protein (globulin). There are two types of subunits, alpha and beta. Each gram of hemoglobin can carry 1.34 ml of oxygen. The oxygen carrying ability of blood is directly proportional to its hemoglobin concentration.
Flu (Influenza) The flu is a contagious respiratory illness caused by influenza viruses. It can cause mild to severe illness. It can also cause death in severe cases. The flu can affect your lungs when you have asthma. It can cause inflammation (swelling) and narrowing of your airways.
Influenza (flu) is a viral infection. People often use the term  flu  to describe any kind of mild illness, such as a cold or a stomach virus, that has symptoms like the flu.But the real flu is different. Flu symptoms are usually worse than a cold and last longer.t usually takes 1 to 4 days to get symptoms of the flu after you have been around someone who has the virus. Most people get better without problems. But sometimes the flu can lead to a bacterial infection, such as an ear infection, a sinus infection, or bronchitis.