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.
The symptoms of influenza (flu) appear suddenly and often include: 1  Fever of 100.4Â°F (38Â°C) to 104Â°F (40Â°C) , which can reach 106Â°F (41Â°C) when symptoms first develop. 2  Fever is usually continuous, but it may come and go. 3  Fever may be lower in older adults than in children and younger adults.