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  1. en.wikipedia.org › wiki › Vitamin_B12Vitamin B12 - Wikipedia

    2024年5月9日 · Vitamin B12, also known as cobalamin, is a water-soluble vitamin involved in metabolism.[2] It is one of eight B vitamins. It is required by animals, which use it as a cofactor in DNA synthesis, and in both fatty acid and amino acid metabolism.[3] It is important in the normal functioning of the nervous system via its role in the synthesis of ...

  2. en.wikipedia.org › wiki › Vitamin_DVitamin D - Wikipedia

    2024年5月9日 · D014807. Legal status. In Wikidata. Vitamin D is a group of fat-soluble secosteroids responsible for increasing intestinal absorption of calcium, magnesium, and phosphate, and for many other biological effects. [1] [2] [3] In humans, the most important compounds in this group are vitamin D 3 ( cholecalciferol) and vitamin D 2 ( ergocalciferol ).

  3. 4 天前 · Down syndrome or Down's syndrome, also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21. [3] It is usually associated with developmental delays, mild to moderate intellectual disability, and characteristic physical features. [1] [12] There are three types of Down syndrome, the ...

  4. en.wikipedia.org › wiki › HokkaidoHokkaido - Wikipedia

    6 天前 · Bird Tanchō (red-crowned crane, Grus japonensis) Flower Hamanasu (rugosa rose, Rosa rugosa) Mascot Kyun-chan (キュンちゃん) Tree Ezomatsu (Jezo spruce, Picea jezoensis) Hokkaido (Japanese: 北海道, Hepburn: Hokkaidō, pronounced [hokka idoː] , lit. ' Northern Sea Circuit ') is the second-largest island of Japan and comprises the largest and northernmost prefecture, making up its own ...

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