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hemoglobin
[ hee-muh-gloh-bin, hem-uh- ]
noun
- the oxygen-carrying pigment of red blood cells that gives them their red color and serves to convey oxygen to the tissues: occurs in reduced form deoxyhemoglobin in venous blood and in combination with oxygen oxyhemoglobin in arterial blood. : Hb
hemoglobin
/ hē′mə-glō′bĭn /
- An iron-containing protein present in the blood of many animals that, in vertebrates, carries oxygen from the lungs to the tissues of the body and carries carbon dioxide from the tissues to the lungs. Hemoglobin is contained in the red blood cells of vertebrates and gives these cells their characteristic color. Hemoglobin is also found in many invertebrates, where it circulates freely in the blood. It consists of four peptide units, each attached to a nonprotein compound called heme that binds to oxygen.
- See Note at red blood cell
hemoglobin
- A complex organic molecule (see also organic molecules ) containing iron that carries oxygen in the blood .
Notes
Other Words From
- he·mo·glo·bic [hee-m, uh, -, gloh, -bik], he·mo·glo·bin·ous [hee-m, uh, -, gloh, -bi-n, uh, s], adjective
Word History and Origins
Origin of hemoglobin1
A Closer Look
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How does hemoglobin compare to similar and commonly confused words? Explore the most common comparisons:
Example Sentences
The volunteers continued using insulin while their blood was checked for changes to T cells and levels of hemoglobin A1c, or HbA1c, which tells how well-controlled glucose is in the blood.
Three years later, that group experienced drops in blood glucose, as measured by hemoglobin A1c.
At this pace, it will burn through its deep reserve of oxygen—provided by extra-large volumes of blood and hemoglobin—more slowly.
Targeting sickle hemoglobin directly has proved problematic given the large abundance of hemoglobin in the blood that would potentially require modification.
The next parameter is tissue oxygenation in the leg muscles, as measured with near-infrared spectroscopy, which basically involves shining infrared light through the skin and measuring how much is absorbed by oxygen-rich hemoglobin.
A single drop of a less-than-lily-white ancestral hemoglobin somewhere along the line?
A red blood cell having no hemoglobin is also called a ghost.
You can't fully understand how hemoglobin molecules interact until you've seen them depicted through a classical pas de deux.
In both conditions chemic tests will show hemoglobin, but in the latter the microscope will reveal the presence of red corpuscles.
In the lungs hemoglobin forms a loose combination with oxygen, which it readily gives up when it reaches the tissues.
Increase of hemoglobin, or hyperchromemia, is uncommon, and is probably more apparent than real.
Clinical study of the blood may be discussed under the following heads: I. Hemoglobin.
In mild cases a slight decrease of hemoglobin is the only blood change noted.
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