Primitive node
Primitive node
The Primitive node (== Template:IPA ==
The Template:IPA (International Phonetic Alphabet) is a system of phonetic notation based primarily on the Latin alphabet. It was devised by the International Phonetic Association in the late 19th century as a standardized representation of the sounds of spoken language.
Pronunciation
The pronunciation of the term "IPA" is /aɪ piː eɪ/ in English.
Etymology
The term "IPA" is an acronym for the International Phonetic Alphabet. The International Phonetic Association, founded in 1886, created the IPA to provide a single, universal system for the transcription of spoken language.
Related Terms
- Phonetic notation: A system used to visually represent the sounds of speech. The IPA is one type of phonetic notation.
- Phonetics: The study of the physical sounds of human speech. It is concerned with the physical properties of speech sounds (phonemes), and the processes of their physiological production, auditory reception, and neurophysiological perception.
- Phonology: The study of the way sounds function within a particular language or languages. While phonetics concerns the physical production, acoustic transmission and perception of the sounds of speech, phonology describes the way sounds function within a particular language or languages.
- Transcription (linguistics): The systematic representation of spoken language in written form. The source of the words transcribe and transcription, the term means "to write across" in Latin, and it's the process of converting spoken language into written form. In linguistics, this is often done using the IPA.
External links
- Medical encyclopedia article on Primitive node
- Wikipedia's article - Primitive node
This WikiMD dictionary article is a stub. You can help make it a full article.
Languages: - East Asian
中文,
日本,
한국어,
South Asian
हिन्दी,
Urdu,
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తెలుగు,
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ಕನ್ನಡ,
Southeast Asian
Indonesian,
Vietnamese,
Thai,
မြန်မာဘာသာ,
European
español,
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русский,
português do Brasil,
Italian,
polski), also known as Hensen's node in avian species, is a key structure in the early stages of embryology. It is a crucial part of the gastrulation process, where it acts as an organizer for the developing embryo.
Etymology
The term "primitive node" is derived from the Latin word 'primus', meaning 'first', and the Latin 'nodus', meaning 'knot'. This reflects its role as the initial point of organization in the embryo. The alternative name, "Hensen's node", is named after the German physiologist Victor Hensen, who first described its function in bird embryos.
Function
The primitive node is a thickened area of cells located at the cranial end of the primitive streak. It plays a crucial role in the process of gastrulation, where it acts as an organizer for the developing embryo. The cells of the primitive node give rise to the notochord, which is a defining structure of all chordates, including humans.
Related Terms
- Gastrulation: The process in which the blastula develops into a gastrula with the formation of three embryonic layers.
- Primitive streak: A structure that forms in the blastula during the early stages of embryonic development.
- Notochord: A flexible rod made out of a material similar to cartilage. If a species has a notochord at any stage of its life cycle, it is, by definition, a member of the phylum Chordata.
External links
- Medical encyclopedia article on Primitive node
- Wikipedia's article - Primitive node
This WikiMD dictionary article is a stub. You can help make it a full article.
Languages: - East Asian
中文,
日本,
한국어,
South Asian
हिन्दी,
Urdu,
বাংলা,
తెలుగు,
தமிழ்,
ಕನ್ನಡ,
Southeast Asian
Indonesian,
Vietnamese,
Thai,
မြန်မာဘာသာ,
European
español,
Deutsch,
français,
русский,
português do Brasil,
Italian,
polski