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==Structure==
 
==Structure==
 
<p>The bursa is a round out-pouching of the [[The Avian Vent and Cloaca - Anatomy & Physiology|cloaca]]. It is found on the caudodorsal surface of the [[The Avian Vent and Cloaca - Anatomy & Physiology|cloaca]] (in the proctodeum) cranial to the dorsal proctodeal gland. The bursa consists of a number of lymphoid lobules and crypt-like folds surrounding a lumen, which is enclosed in a thin layer of stratified squamous epithelium. The lumen opens into the proctodeum.</p>
 
<p>The bursa is a round out-pouching of the [[The Avian Vent and Cloaca - Anatomy & Physiology|cloaca]]. It is found on the caudodorsal surface of the [[The Avian Vent and Cloaca - Anatomy & Physiology|cloaca]] (in the proctodeum) cranial to the dorsal proctodeal gland. The bursa consists of a number of lymphoid lobules and crypt-like folds surrounding a lumen, which is enclosed in a thin layer of stratified squamous epithelium. The lumen opens into the proctodeum.</p>
<p>Like the [[Thymus - Anatomy & Physiology|thymus]] the lobules have a cortex and medulla and the [[Lymphocytes|lymphocytes]] are supported by epithelial cells. [[Lymphocytes - Anatomy & Physiology#B cells|B lymphocytes]] developing from the lymphoid precursors gather in the cortex, hence the cortex stains stronger than the medulla.</p>
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<p>Like the [[Thymus - Anatomy & Physiology|thymus]] the lobules have a cortex and medulla and the [[Lymphocytes|lymphocytes]] are supported by epithelial cells. B lymphocytes developing from the lymphoid precursors gather in the cortex, hence the cortex stains stronger than the medulla.</p>
 
===Histology===
 
===Histology===
 
<center><gallery perrow="3">
 
<center><gallery perrow="3">
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