White pulp
http://dbpedia.org/resource/White_pulp an entity of type: Thing
La polpa blanca de la melsa és una regió histològica de la melsa composta de beines limfocítiques periarterials (regió dels limfòcits T) i nòduls esplènics (regió de limfòcits B). La funció d'aquesta àrea intervé en la defensa i les reaccions immunològiques, gràcies a les denses acumulacions de limfòcits. Aproximadament un 25% de la melsa normal és polpa blanca.
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白髓，亦作白脾髓，是脾臟的一部份，與紅脾髓一起構成脾臟的主要部份。白脾髓由及等腺體組織構成，外貌呈球型，包裹着小動脈。它的主要功能则为对抗外来微生物及感染。這些組織的大小不一，其直經從0.25毫米到1毫米。
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White pulp is a histological designation for regions of the spleen (named because it appears whiter than the surrounding red pulp on gross section), that encompasses approximately 25% of splenic tissue. White pulp consists entirely of lymphoid tissue. Specifically, the white pulp encompasses several areas with distinct functions:
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Polpa blanca
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White pulp
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白脾髓
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White pulp
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White pulp
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5010792
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1027357859
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Spleen
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Transverse section of a portion of the spleen.
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Gray1191.png
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La polpa blanca de la melsa és una regió histològica de la melsa composta de beines limfocítiques periarterials (regió dels limfòcits T) i nòduls esplènics (regió de limfòcits B). La funció d'aquesta àrea intervé en la defensa i les reaccions immunològiques, gràcies a les denses acumulacions de limfòcits. Aproximadament un 25% de la melsa normal és polpa blanca.
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White pulp is a histological designation for regions of the spleen (named because it appears whiter than the surrounding red pulp on gross section), that encompasses approximately 25% of splenic tissue. White pulp consists entirely of lymphoid tissue. Specifically, the white pulp encompasses several areas with distinct functions:
* The periarteriolar lymphoid sheaths (PALS) are typically associated with the arteriole supply of the spleen; they contain T lymphocytes.
* Lymph follicles with dividing B lymphocytes are located between the PALS and the marginal zone bordering on the red pulp. IgM and IgG2 are produced in this zone. These molecules play a role in opsonization of extracellular organisms, encapsulated bacteria in particular.
* The marginal zone exists between the white pulp and red pulp. It is located farther away from the central arteriole, in proximity to the red pulp. It contains antigen-presenting cells (APCs), such as dendritic cells and macrophages. Some of the white pulp's macrophages are of a specialized kind known as metallophilic macrophages.
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白髓，亦作白脾髓，是脾臟的一部份，與紅脾髓一起構成脾臟的主要部份。白脾髓由及等腺體組織構成，外貌呈球型，包裹着小動脈。它的主要功能则为对抗外来微生物及感染。這些組織的大小不一，其直經從0.25毫米到1毫米。
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noduli lymphoidei splenici
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4552
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noduli lymphoidei splenici