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[[Image:LH_Bursa_Photo.jpg|thumb|150px|right|<p>'''Bursa of Fabricius'''</p>^{©Nottingham Uni 2008}]]

[[Image:LH_Bursa_Photo.jpg|thumb|150px|right|<p>'''Bursa of Fabricius'''</p>^{©Nottingham Uni 2008}]]

<p>''Also called the cloacal bursa''</p>

<p>''Also called the cloacal bursa''</p>

<p>It is a [[Primary Lymphoid Tissue - Anatomy & Physiology|primary lymphoid organ]] found in birds. The bursa was the first place that a certain subset of [[Lymphocytes - Anatomy & Physiology|lymphocytes]] was observed and consequently they were named B lymphocytes (<u>b</u>ursa of Fabricius or <u>b</u>ursa equivalent organs). The bursa is involved in the differentiation of [[Lymphocytes - Anatomy & Physiology#B cells|B lymphocytes]].</p>

<p>It is a [[Primary Lymphoid Tissue - Anatomy & Physiology|primary lymphoid organ]] found in birds. The bursa was the first place that a certain subset of [[Lymphocytes - WikiBlood|lymphocytes]] was observed and consequently they were named B lymphocytes (<u>b</u>ursa of Fabricius or <u>b</u>ursa equivalent organs). The bursa is involved in the differentiation of [[Lymphocytes - WikiBlood#B cells|B lymphocytes]].</p>

==Development==

==Development==

[[Image:LH_Bursa_Cloaca_Photo.jpg|thumb|150px|right|<p>'''Bursa of Fabricius'''</p>^{©Nottingham Uni 2008}]]

[[Image:LH_Bursa_Cloaca_Photo.jpg|thumb|150px|right|<p>'''Bursa of Fabricius'''</p>^{©Nottingham Uni 2008}]]

Image:LH_Bursa_High_Histology.jpg|<p>'''High power magnification'''</p>^{©Nottingham Uni 2008}</gallery></center>

Image:LH_Bursa_High_Histology.jpg|<p>'''High power magnification'''</p>^{©Nottingham Uni 2008}</gallery></center>

==Functions==

==Functions==

<p>The bursa’s primary function is maturating and causing the differentiation of [[Lymphocytes - Anatomy & Physiology#B cells|B lymphocytes]], it also produces the hormone bursin which activates [[Lymphocytes - Anatomy & Physiology#B cells|B lymphocytes]]. </p>

<p>The bursa’s primary function is maturating and causing the differentiation of [[Lymphocytes - WikiBlood#B cells|B lymphocytes]], it also produces the hormone bursin which activates [[Lymphocytes - WikiBlood#B cells|B lymphocytes]]. </p>

<p>The bursa has some [[Lymphocytes - Anatomy & Physiology#T cells|T lymphocytes]] present near to its opening into the proctodeum where they survey antigens.</p>

<p>The bursa has some [[Lymphocytes - WikiBlood#T cells|T lymphocytes]] present near to its opening into the proctodeum where they survey antigens.</p>

==In pathology==

==In pathology==

*[[Lymphoreticular/Haemotopoietic system - Bursa of Fabricius#Pathology|See here]]

*[[Lymphoreticular/Haemotopoietic system - Bursa of Fabricius#Pathology|See here]]