Definitions for hemoglobin
ˈhi məˌgloʊ bɪn, ˈhɛm ə-he·mo·glo·bin

Princeton's WordNetRate this definition:0.0 / 0 votes

1. hemoglobin, haemoglobin, Hbnoun

   a hemoprotein composed of globin and heme that gives red blood cells their characteristic color; function primarily to transport oxygen from the lungs to the body tissues

   "fish have simpler hemoglobin than mammals"

WiktionaryRate this definition:0.0 / 0 votes

1. hemoglobinnoun

   The iron-containing substance in red blood cells that transports oxygen from the lungs to the rest of the body; it consists of a protein (globulin), and haem (a porphyrin ring with an atom of iron at its centre).

2. Etymology: From αἷμα + globus + -in.

WikipediaRate this definition:0.0 / 0 votes

1. Hemoglobin

   Hemoglobin (haemoglobin BrE) (from the Greek word αἷμα, haîma 'blood' + Latin globus 'ball, sphere' + -in) (), abbreviated Hb or Hgb, is the iron-containing oxygen-transport metalloprotein present in red blood cells (erythrocytes) of almost all vertebrates (the exception being the fish family Channichthyidae) as well as the tissues of some invertebrates. Hemoglobin in blood carries oxygen from the respiratory organs (e.g. lungs or gills) to the rest of the body (i.e. tissues). There it releases the oxygen to permit aerobic respiration to provide energy to power functions of an organism in the process called metabolism. A healthy individual human has 12 to 20 grams of hemoglobin in every 100 mL of blood. In mammals, the chromoprotein makes up about 96% of the red blood cells' dry content (by weight), and around 35% of the total content (including water). Hemoglobin has an oxygen-binding capacity of 1.34 mL O2 per gram, which increases the total blood oxygen capacity seventy-fold compared to dissolved oxygen in blood. The mammalian hemoglobin molecule can bind (carry) up to four oxygen molecules.Hemoglobin is involved in the transport of other gases: It carries some of the body's respiratory carbon dioxide (about 20–25% of the total) as carbaminohemoglobin, in which CO2 is bound to the heme protein. The molecule also carries the important regulatory molecule nitric oxide bound to a thiol group in the globin protein, releasing it at the same time as oxygen.Hemoglobin is also found outside red blood cells and their progenitor lines. Other cells that contain hemoglobin include the A9 dopaminergic neurons in the substantia nigra, macrophages, alveolar cells, lungs, retinal pigment epithelium, hepatocytes, mesangial cells in the kidney, endometrial cells, cervical cells and vaginal epithelial cells. In these tissues, hemoglobin has a non-oxygen-carrying function as an antioxidant and a regulator of iron metabolism. Excessive glucose in one's blood can attach to hemoglobin and raise the level of hemoglobin A1c.Hemoglobin and hemoglobin-like molecules are also found in many invertebrates, fungi, and plants. In these organisms, hemoglobins may carry oxygen, or they may act to transport and regulate other small molecules and ions such as carbon dioxide, nitric oxide, hydrogen sulfide and sulfide. A variant of the molecule, called leghemoglobin, is used to scavenge oxygen away from anaerobic systems, such as the nitrogen-fixing nodules of leguminous plants, lest the oxygen poison (deactivate) the system. Hemoglobinemia is a medical condition in which there is an excess of hemoglobin in the blood plasma. This is an effect of intravascular hemolysis, in which hemoglobin separates from red blood cells, a form of anemia.

ChatGPTRate this definition:0.0 / 0 votes

1. hemoglobin

   Hemoglobin is a red protein responsible for transporting oxygen in the blood of vertebrates. Its molecule comprises four subunits, each containing an iron atom bound to a heme group. Changes in the shape and functionality of this protein can affect the ability of red blood cells to transport oxygen efficiently, making hemoglobin central to the health of our circulatory and respiratory systems.

Webster DictionaryRate this definition:0.0 / 0 votes

1. Hemoglobinnoun

   the normal coloring matter of the red blood corpuscles of vertebrate animals. It is composed of hematin and globulin, and is also called haematoglobulin. In arterial blood, it is always combined with oxygen, and is then called oxyhemoglobin. It crystallizes under different forms from different animals, and when crystallized, is called haematocrystallin. See Blood crystal, under Blood

2. Etymology: [Hemo- + globe.]

WikidataRate this definition:0.0 / 0 votes

1. Hemoglobin

   Hemoglobin is the iron-containing oxygen-transport metalloprotein in the red blood cells of all vertebrates as well as the tissues of some invertebrates. Hemoglobin in the blood carries oxygen from the respiratory organs to the rest of the body where it releases the oxygen to burn nutrients to provide energy to power the functions of the organism, and collects the resultant carbon dioxide to bring it back to the respiratory organs to be dispensed from the organism. In mammals, the protein makes up about 97% of the red blood cells' dry content, and around 35% of the total content. Hemoglobin has an oxygen binding capacity of 1.34 mL O2 per gram of hemoglobin, which increases the total blood oxygen capacity seventy-fold compared to dissolved oxygen in blood. The mammalian hemoglobin molecule can bind up to four oxygen molecules. Hemoglobin is involved in the transport of other gases: it carries some of the body's respiratory carbon dioxide as carbaminohemoglobin, in which CO2 is bound to the globin protein. The molecule also carries the important regulatory molecule nitric oxide bound to a globin protein thiol group, releasing it at the same time as oxygen.

Matched Categories

1. • Hemoprotein

How to pronounce hemoglobin?

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How to say hemoglobin in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of hemoglobin in Chaldean Numerology is: 6

2. Pythagorean Numerology

   The numerical value of hemoglobin in Pythagorean Numerology is: 1

Examples of hemoglobin in a Sentence

1. Sandra Hunter:

   The best women will never outrun the best men, physiological differences explain that men will always be faster: Women have smaller hearts, more fat to carry, less hemoglobin, less muscle mass.

2. Douglas Higgs:

   A major question hanging over this approach, which is hugely expensive, is whether this procedure, which involves killing off abnormal stem cells to replace them with modified stem cells, will ever become clinically possible in developing countries where the majority of these disorders of hemoglobin occur.

3. Douglas Higgs:

   Even though this is the best we can achieve at the moment, not all patients become free of transfusions and we still do not know the long-term effects of manipulating the genome of stem cells in this way, a major question hanging over this approach, which is hugely expensive, is whether this procedure, which involves killing off abnormal stem cells to replace them with modified stem cells, will ever become clinically possible in developing countries where the majority of these disorders of hemoglobin occur.

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References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=hemoglobin
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Hemoglobin
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Hemoglobin
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/hemoglobin
6. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=hemoglobin