Red blood cells contain a protein called hemoglobin that takes up and releases oxygen in response to the environment around it. Hemoglobin is what's called a "metalloprotein" because it incorporates atoms of iron into its structure. This iron is positively charged and readily binds with oxygen. In oxygen-poor environments, the hemoglobin releases the oxygen it carries and picks up carbon dioxide.Know More
When hemoglobin is exposed to high oxygen concentrations, such as in the lungs, it flexes open to expose its iron atoms to the oxygen. After binding with oxygen, the hemoglobin is carried by red blood cells to various parts of the body. These destination sites are poor in oxygen, and the differential induces the hemoglobin protein to shed its oxygen. The ionized iron is then exposed and eager to bond with carbon dioxide. The hemoglobin holds this waste gas securely until the red blood cell is transported back into the oxygen-rich environment of the lungs, where the cycle repeats and more oxygen is taken up.
Around 25 percent of the cells in the human body are red blood cells, with 2.4 million of them produced every second. Each red blood cell contains around 270 million hemoglobin molecules, circulates through the body once every 20 seconds, and lasts between 100 and 120 days before breaking down.Learn more about Blood
Red blood cells carry waste from the cells to the lungs. Once this happens, the lungs remove the waste from the body by exhalation.Full Answer >
InnovateUs states that the main function of hemoglobin is transporting oxygen from the lungs to other parts of the body. It is an important chemical in red blood cells that carries oxygen, and performs different effect modulation and gas transport duties.Full Answer >
According to the Information Center for Sickle Cell and Thalassemic Disorders, hemoglobin bonds to oxygen molecules from the lungs and delivers them to cells throughout the body. It does this with two similar bonded proteins which are necessary for the capture and release of oxygen via a central iron atom.Full Answer >
In a blood test, "HB" is an abbreviation for hemoglobin. The value describes the hemoglobin levels in the blood.Full Answer >