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--- blood [2021/03/18 05:29]
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 ==== Oxygen is transported by erythrocytes ====
-Oxygen in human blood is transported mainly by erythrocytes. In combination with hemoglobin, it forms oxygenated (not oxidized, there is no oxidation reaction between iron and oxygen) hemoglobin - oxyhemoglobin. In contrast, about 3% of oxygen is transported in dissolved form in plasma. [([[https://www.toppr.com/ask/question/oxygen-is-transported-through-blood-mainly-by/|TOPPR]])]
+Oxygen in human blood is transported mainly by erythrocytes. In combination with hemoglobin, it forms oxygenated (not oxidized, there is no oxidation reaction between iron and oxygen) hemoglobin (oxyhemoglobin). In contrast, about 3 percent of oxygen is transported in dissolved form in plasma. [([[https://www.toppr.com/ask/question/oxygen-is-transported-through-blood-mainly-by/|TOPPR]])]
 ==== The Rh system ====
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 ==== The rarest blood type ====
-AB is the rarest of the AB0 system groups, and Rh- is always less numerous than Rh+. In western Europe, only 1% of the population has AB- blood. In the far east, Rh- is very rare, so in Japan, only 0.05% of people have AB- blood. [([[https://www.healthline.com/health/rarest-blood-type|HealthLine]])]
+AB is the rarest of the AB0 system groups, and Rh- is always less numerous than Rh+. In western Europe, only 1 percent of the population has AB- blood. In the far east, Rh- is very rare, so in Japan, only 0.05 percent of people have AB- blood. [([[https://www.healthline.com/health/rarest-blood-type|HealthLine]])]
+==== 7% of body weight ====
+Blood is the most important component of any living organism and accounts for about 7% of body weight. [([[https://www2.palomar.edu/anthro/blood/blood_components.htm|Palomar]])]
+==== 1 cup of blood ====
+A newborn baby has about 1 cup of blood in its body. [([[https://www.livescience.com/32213-how-much-blood-is-in-the-human-body.html|Live Science]])]
+==== 55% ====
+About 55% of our blood consists of plasma. [([[https://www.redcrossblood.org/donate-blood/dlp/plasma-information.html|Red Cross Blood]])]
+==== Plasma ====
+Plasma is a carrier base for morphotic elements. It contains organic and inorganic components. Inorganic components are sodium, potassium, chloride, and carbonate ions. Organic components are proteins, non-protein nitrogenous and nitrogen-free components, and plasma lipids. [([[https://www.news-medical.net/health/Blood-Plasma-Components-and-Function.aspx|News Medical]])]
+==== Leukocytes ====
+Leukocytes are found in blood, lymph, and connective tissue. They are formed in the bone marrow and the lymphoid system (thymus, spleen, lymph nodes, and lymph nodes). In the blood of a healthy person, there are 4-10 thousand /mm3. They are divided into granulocytes, lymphocytes, and monocytes. [([[https://lifesci.dls.rutgers.edu/~babiarz/bloodtx.htm|Rutgers]])]
+==== Reticulocyte ====
+The immature form of the red blood cell is the reticulocyte. The number of reticulocytes in the blood illustrates the rate of production by the bone marrow. [([[https://medlineplus.gov/lab-tests/reticulocyte-count/|MedLine Plus]])]
+==== Remember their enemies ====
+Lymphocytes remember their enemies. They are able to recognize them and fend off an attack even decades after they first suffered a disease. [([[https://www.betterhealth.vic.gov.au/health/conditionsandtreatments/immune-system|Better Health]])]
+==== Granulocytes ====
+Granulocytes are divided into neutrophils, eosinophils, and basophils. Neutrophils (neutrophilic granulocytes) make up about 60% of leukocytes. They defend the body against infections and phagocytose pathogenic microorganisms. Eosinophils (acidophilic granulocytes) make up 2-5% of leukocytes. Their number increases after parasite infection and with allergies. Basophils (basophilic granulocytes) produce heparin, a substance that prevents blood clotting. [([[https://www.sciencedirect.com/topics/veterinary-science-and-veterinary-medicine/granulocytes|Science Direct]])]
+==== Thrombocytes ====
+Thrombocytes (platelets) are responsible for blood clotting. They are fragments of the cytoplasm of marrow cells or megakaryocytes. They live for up to 10 days, after which they are broken down in the spleen. In human blood, they are present in the amount of 200-300 thousand/mm3. [([[https://www.verywellhealth.com/thrombocyte-what-is-a-thrombocyte-797228|Very Well Health]])]
+==== Storage ====
+In the blood is stored most of the organism's information. Just 0.05 ml of blood contains the complete genome or 3 billion pairs of nucleotides. [([[https://www.genome.gov/about-genomics/educational-resources/fact-sheets/human-genome-project|Genome]])]
+==== Differences in blood type ====
+People with blood type O are less likely to suffer heart attacks and strokes than those with blood type AB. [([[https://www.pennmedicine.org/news/news-blog/2018/february/the-connection-between-blood-type-and-heart-health|Penn Medicine]])]
+==== Synthetic blood ====
+Swedish scientists have succeeded in obtaining synthetic blood from stem cells. [([[https://www.statnews.com/2017/02/27/artificial-blood-substitute/|Stat News]])]
+==== Origin of bloodtypes ====
+Probably 20000 years ago, all humans had the same blood type - 0. It was only when man shifted from nomadic to a sedentary mode that a new blood type - A. The AB type was created about 1000 years ago. [([[https://www.dadamo.com/txt/index.pl?1010| Hoop-A-Joop]])]
+{{tag>science biology}}

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