Difference between revisions of "Spleen - Anatomy & Physiology"

Revision as of 13:17, 12 August 2009

()Map\Tab LYMPHATIC SYSTEM (Map/Tab) SECONDARY LYMPHOID TISSUE

Location canine radiograph

Lateral view	Ventrodorsal view
^{©Nottingham Uni 2008}

Gross histological view
^{©Nottingham Uni 2008}

Introduction

The spleen is a major lymphoid and blood filtration organ and is located in the left cranial abdomen. It is responsible for storing and removing erythrocytes from the blood as well as antigen surveillance of the blood and antibody production.

Development

The spleen develops in association with the digestive system in the dorsal mesogastrium, and as the stomach rotates during development the spleen comes to occupy the left cranial abdomen. Haematopoietic cells in the spleen are derived from the AGM (aorta-gonad-mesonephros) and yolk sac and as the primary lymphoid organs become established it becomes populated with T and B lymphocytes.

Structure

Normal Ultrasound (Equine)	Histological section

^{©Nottingham Uni 2008}

The spleen lies vertically on the left side of the cranial abdomen. It is attached to the greater curvature of the stomach by the gastrosplenic ligament. The spleen is enclosed in a capsule of fibrous and elastic tissue that extends into the parenchyma as trabeculae.

The parenchyma is supported by a fine mesh of reticular fibres and is divided into two types of tissue, the red and the white pulp, which are separated by the marginal sinus.

Red Pulp

The red pulp makes up the majority of the spleen and is composed of a network of cell cords in series with vascular sinuses. The splenic cords contain macrophages, plasma cells, lymphocytes and other mature blood cells e.g. granulocytes and erythrocytes. While the vascular sinuses are wide vascular channels lined with endothelial cells. Blood cells and fluid can pass into the splenic cords through fenestrations in the sinus walls.

White Pulp

White pulp is organised in relation to the splenic arterioles and consists of discrete lymphoid tissue surrounding a central arteriole. There is a sheath of T cells directly around the arteriole, the periarteriolar lymphoid sheath (PALS), which is surrounded by a marginal sinus, and then a zone of B cells and macrophages (the marginal zone). B cell follicles are associated with the marginal zone and expand and develop germinal centres after antigen activation. The marginal sinuses are linked to the red pulp sinuses.

White pulp stains basophilc in a H&E stain

Species Differences

Equine	Bovine

^{©Nottingham Uni 2008}

Canine	Ovine
^{©RVC 2008}

The capsule and trabeculae are much more muscular in carnivores and horses than ruminants

Carnivores
- Is elongated and dumb-bell shaped (larger ventrally)
Ruminants
- Is flat and oblong shaped
Horses
- Lies under the last three ribs. Dorsally it is broad but narrows as it extends cranially and ventrally
- On rectal palpation it is located against the body wall and feels smooth with a sharp border
Pigs
- Elongated and strap like under the last few ribs
Birds (Picture here)
- Lies alongside, to the right, of the proventriculus and is found caudaodorsally to the liver
- Spherical in chickens, triangular in ducks & oval in pigeons

Vasculature

The splenic artery, a branch of the celiac artery, supplies the spleen. The artery branches into arterioles and capillaries, which may either:

Connect with the venous sinuses, or
Terminate with open ends in the splenic cords

Blood released into the splenic cords, either from the sinuses or capillaries eventually filters back into the sinus network. The sinuses converge and empty into trabecular veins, which then merge into a single splenic vein which then empties into the portal vein.

Lymphocytes in the arterial blood migrate from the red pulp sinuses, through the splenic cords and through the white pulp. T cells specifically migrate through the PALS and B cells specifically migrate through the follicles. Antigen in the blood is filtered by the large numbers of macrophages in the splenic cords and white pulp.

Species Differences

The splenic artery:

Passes through the spleen without dividing in ruminants
Branches regularly as it passes through the spleen in horses and pigs
Branches before it reaches the spleen in dogs and cats

Innervation

Innervation is purely sympathetic^[1] and nerve fibres travel with the artery into the spleen.

Histology

Gross view (rat)
^{©RVC 2008}
Red & white Pulp (rat)
^{©RVC 2008}
Central artery & PALS (rat)
^{©RVC 2008}
Trabecula and capsule (rat)
^{©RVC 2008}
Trabeculae & erythrocytes (rat)
^{©RVC 2008}
Megakaryocyte & macrophages (mouse)
^{©RVC 2008}

Functions

The spleen has a number of functions:

It filters the blood removing ageing erythrocytes and antigens
It stores erythrocytes and platelets
Secondary lymphoid organ

Erythrocytes & Platelets

In the foetus the spleen also has a role in haematopoiesis when it becomes the main erythrocyte producing organ during the hematopoietic transitional phase.

In the developed animal the red pulp is involved in the removal of aged, damaged or abnormal erythrocytes (along with the liver and bone marrow). As erythrocytes age they become less supple and this causes them to become damaged when they pass through the very narrow capillaries of the spleen, after which they are phagocytised by splenic macrophages. If a splenectomy is performed the number of aged erythrocytes in circulation increases.

The red pulp also acts as a storage site for erythrocytes. The degree of storage is variable between species but is particularly notable in horses which during exercise under sympathetic activity can contract their spleen to increase the concentration of circulating erythrocytes. In some species such as cats and rodents the red pulp acts as a storage site for platelets and contains megakaryocytes.

Lymphoid

Blood flows through the marginal sinus meaning that most antigens present in the blood come into contact with the B lymphocytes and dendritic cells in the spleen. Dendritic cells in the marginal sinus and red pulp take up antigens from the blood and transport them to the primary follicles in the white pulp. If the antigen activates the B lymphocytes then a germinal centre will form in the primary follicle and this is called a splenic nodule. Antibody producing cells then migrate to the red pulp and marginal zone.

Following splenectomy this doesn’t occur and animals are predisposed to septicaemia and infection with blood protozoa.

In pathology

Direct pathology

Specific spleen pathology can be found here
Acute undifferentiated leukaemia and lymphoid neoplasms

Changed or affected by

References

↑ Nance, D.M. and Sanders, V.M. (2007) Autonomic innervation and regulation of the immune system (1987-2007). Brain, Behavior, and Immunity 21(6): pp.736-745.

[1] Nance, D.M. and Sanders, V.M. (2007) Autonomic innervation and regulation of the immune system (1987-2007). Brain, Behavior, and Immunity 21(6): pp.736-745.

[1]

@@ Line 1: / Line 1: @@
+{{toplink
+|linkpage =Lymphatic System - Anatomy & Physiology
+|linktext =Lymphatic System
+|tablelink = Lymphatic System (Table) - Anatomy & Physiology
+|maplink = Lymphatic System (Content Map) - Anatomy & Physiology
+|sublink1 =Secondary Lymphoid Tissue - Anatomy & Physiology
+|subtext1 =Secondary Lymphoid Tissue
+|pagetype =Anatomy
+}}
+<br>
 {|style="border:1px solid #cedff2;" align="right"
 |
 {|
-|[[Image:LH_Canine_labelled_lateral_abdominal_organs_radiograph.jpg|200px]]
+|[[Image:LH_Canine_labelled_lateral_abdominal_organs_radiograph.jpg|150px]]
-|[[Image:LH_Canine_labelled_ventrodorsal_abdominal_organs_radiograph.jpg|200px]]
+|[[Image:LH_Canine_labelled_ventrodorsal_abdominal_organs_radiograph.jpg|150px]]
 |-
 !colspan="2"|<center>Location canine radiograph</center>
@@ Line 13: / Line 22: @@
 |colspan="2"|<center><sup>©Nottingham Uni 2008</sup></center>
 |-
-|colspan="2"|<center>[[Image:LH Spleen Histology.jpg|200px]]</center>
+|colspan="2"|<center>[[Image:LH Spleen Gross Histology.jpg|150px]]</center>
 |-
-|colspan="2"|<center>'''Histological view'''</center>
+|colspan="2"|<center>'''Gross histological view'''</center>
 |-
 |colspan="2"|<center><sup>©Nottingham Uni 2008</sup></center>
@@ Line 22: / Line 31: @@
 ==Introduction==
-The spleen is a major lymphoid and blood filtration organ and is located in the left cranial abdomen. It is responsible for storing and removing [[Erythrocytes|erythrocytes]] from the blood as well as antigen surveillance of the blood and antibody production.
+The spleen is a major lymphoid and blood filtration organ and is located in the left cranial abdomen. It is responsible for storing and removing [[Erythrocytes - WikiBlood|erythrocytes]] from the blood as well as antigen surveillance of the blood and antibody production.
 ==Development==
-<p>The spleen develops in association with the digestive system in the dorsal mesogastrium, and as the [[Monogastric Stomach - Anatomy & Physiology|stomach]] rotates during development the spleen comes to occupy the left cranial abdomen. Haematopoietic cells in the spleen are derived from the AGM (aorta-gonad-mesonephros) and yolk sac and as the [[:Category:Primary Lymphoid Tissue|primary lymphoid organs]] become established it becomes populated with [[Lymphocytes#Types|T and B lymphocytes]].</p>
+<p>The spleen develops in association with the digestive system in the dorsal mesogastrium, and as the [[Forestomach - Anatomy & Physiology|stomach]] rotates during development the spleen comes to occupy the left cranial abdomen. Haematopoietic cells in the spleen are derived from the AGM (aorta-gonad-mesonephros) and yolk sac and as the [[Primary Lymphoid Tissue - Anatomy & Physiology|primary lymphoid organs]] become established it becomes populated with [[Lymphocytes - WikiBlood#Types|T and B lymphocytes]].</p>
 ==Structure==
 {|align="right"
@@ Line 35: / Line 44: @@
 |colspan="2"|<center><sup>©Nottingham Uni 2008 </sup></center>
 |}
-<p>The spleen lies vertically on the left side of the cranial abdomen. It is attached to the greater curvature of the [[Alimentary System Overview - Anatomy & Physiology#Stomach|stomach]] by the gastrosplenic ligament. The spleen is enclosed in a capsule of fibrous and elastic tissue that extends into the parenchyma as trabeculae.  </p>
+<p>The spleen lies vertically on the left side of the cranial abdomen. It is attached to the greater curvature of the [[Alimentary - Anatomy & Physiology#Stomach|stomach]] by the gastrosplenic ligament. The spleen is enclosed in a capsule of fibrous and elastic tissue that extends into the parenchyma as trabeculae.  </p>
 <p> The parenchyma is supported by a fine mesh of reticular fibres and is divided into two types of tissue, the red and the white pulp, which are separated by the marginal sinus.</p>
 ===Red Pulp===
-<p>The red pulp makes up the majority of the spleen and is composed of a network of cell cords in series with vascular sinuses. The splenic cords contain [[Macrophages|macrophages]], [[B cell differentiation#Plasma cells|plasma cells]], [[Lymphocytes - Introduction|lymphocytes]] and other mature blood cells e.g. [[Blood Cells - Overview|granulocytes]] and [[Erythrocytes|erythrocytes]].  While the vascular sinuses are wide vascular channels lined with endothelial cells. Blood cells and fluid can pass into the splenic cords through fenestrations in the sinus walls. </p>
+<p>The red pulp makes up the majority of the spleen and is composed of a network of cell cords in series with vascular sinuses. The splenic cords contain [[Macrophages - WikiBlood|macrophages]], [[B cell differentiation - WikiBlood#Plasma cells|plasma cells]], [[Lymphocytes - WikiBlood|lymphocytes]] and other mature blood cells e.g. [[Granulocyte - WikiBlood|granulocytes]] and [[Erythrocytes - WikiBlood|erythrocytes]].  While the vascular sinuses are wide vascular channels lined with endothelial cells. Blood cells and fluid can pass into the splenic cords through fenestrations in the sinus walls. </p>
 ===White Pulp===
-<p>White pulp is organised in relation to the splenic arterioles and consists of discrete lymphoid tissue surrounding a central arteriole. There is a sheath of [[Lymphocytes#T cells|T cells]] directly around the arteriole, the periarteriolar lymphoid sheath (PALS), which is surrounded by a marginal sinus, and then a zone of [[Lymphocytes#B cells|B cells]] and [[Macrophages|macrophages]] (the marginal zone). B cell follicles are associated with the marginal zone and expand and develop germinal centres after antigen activation. The marginal sinuses are linked to the red pulp sinuses. </p><p>White pulp stains basophilic in a H&E stain</p>
+<p>White pulp is organised in relation to the splenic arterioles and consists of discrete lymphoid tissue surrounding a central arteriole. There is a sheath of [[Lymphocytes - WikiBlood#T cells|T cells]] directly around the arteriole, the periarteriolar lymphoid sheath (PALS), which is surrounded by a marginal sinus, and then a zone of [[Lymphocytes - WikiBlood#B cells|B cells]] and [[Macrophages - WikiBlood|macrophages]] (the marginal zone). B cell follicles are associated with the marginal zone and expand and develop germinal centres after antigen activation. The marginal sinuses are linked to the red pulp sinuses. </p><p>White pulp stains basophilc in a H&E stain</p>
 ====Species Differences====
 {|align="right"
@@ Line 66: / Line 74: @@
 **Is flat and oblong shaped
 *Horses
-**Lies under the last three [[Ribs and Sternum - Anatomy & Physiology|ribs]]. Dorsally it is broad but narrows as it extends cranially and ventrally
+**Lies under the last three [[Ribs and Sternum: Anatomy and Physiology|ribs]]. Dorsally it is broad but narrows as it extends cranially and ventrally
 **On rectal palpation it is located against the body wall and feels smooth with a sharp border
 *Pigs
-**Elongated and strap-like under the last few [[Ribs and Sternum - Anatomy & Physiology|ribs]]
+**Elongated and strap like under the last few [[Ribs and Sternum: Anatomy and Physiology|ribs]]
 *Birds ([[Media:Avian Liver and Spleen.jpg|Picture here]])
-**Lies alongside, to the right, of the [[Proventriculus - Anatomy & Physiology|proventriculus]] and is found caudodorsally to the [[Avian Liver - Anatomy & Physiology|liver]]
+**Lies alongside, to the right, of the [[The Proventriculus - Anatomy & Physiology|proventriculus]] and is found caudaodorsally to the [[Avian Liver - Anatomy & Physiology|liver]]
 **Spherical in chickens, triangular in ducks & oval in pigeons
@@ Line 78: / Line 86: @@
 *Connect with the venous sinuses, or
 *Terminate with open ends in the splenic cords
-Blood released into the splenic cords, either from the sinuses or capillaries, eventually filters back into the sinus network. The sinuses converge and empty into trabecular veins, which then merge into a single splenic vein which then empties into the portal vein.</p>
+Blood released into the splenic cords, either from the sinuses or capillaries eventually filters back into the sinus network. The sinuses converge and empty into trabecular veins, which then merge into a single splenic vein which then empties into the portal vein.</p>
-<p>[[Lymphocytes - Introduction|Lymphocytes]] in the arterial blood migrate from the red pulp sinuses, through the splenic cords and through the white pulp. [[Lymphocytes#T cells|T cells]] specifically migrate through the PALS and [[Lymphocytes#B cells|B cells]] specifically migrate through the follicles. Antigen in the blood is filtered by the large numbers of [[Macrophages|macrophages]] in the splenic cords and white pulp.</p>
+<p>[[Lymphocytes - WikiBlood|Lymphocytes]] in the arterial blood migrate from the red pulp sinuses, through the splenic cords and through the white pulp. [[Lymphocytes - WikiBlood#T cells|T cells]] specifically migrate through the PALS and [[Lymphocytes - WikiBlood#B cells|B cells]] specifically migrate through the follicles. Antigen in the blood is filtered by the large numbers of [[Macrophages - WikiBlood|macrophages]] in the splenic cords and white pulp.</p>
 ====Species Differences====
 <p>The splenic artery:
@@ Line 85: / Line 93: @@
 *Branches regularly as it passes through the spleen in horses and pigs
 *Branches before it reaches the spleen in dogs and cats</p>
 ===Innervation===
 Innervation is purely sympathetic<ref>{{citation|initiallast = Nance|initialfirst = D.M|finallast = Sanders|finalfirst = V.M|year = 2007|jtitle = Autonomic innervation and regulation of the immune system (1987-2007)|jor = Brain, Behavior, and Immunity|vol = 21(6)|range = 736-745}}</ref> and nerve fibres travel with the artery into the spleen.
 ===Histology===
-<center><gallery>
+<gallery perrow="3">
-Image:LH_Spleen_Rat_Histology.jpg|<p>'''Low magnification view (rat)'''</p><sup>©RVC 2008</sup>
+Image:LH_Spleen_Rat_Histology.jpg|<p>'''Gross view (rat)'''</p><sup>©RVC 2008</sup>
 Image:LH_Spleen_Rat_Higher_Histology.jpg|<p>'''Red & white Pulp (rat) '''</p><sup>©RVC 2008</sup>
 Image:LH_Spleen_Rat_Higher_2_Histology.jpg|<p>'''Central artery & PALS (rat) '''</p><sup>©RVC 2008</sup>
 Image:LH_Spleen_Rat_Higher_3_Histology.jpg|<p>'''Trabecula and capsule (rat) '''</p><sup>©RVC 2008</sup>
 Image:LH_Spleen_Rat_Higher_4_Histology.jpg|<p>'''Trabeculae & erythrocytes (rat)'''</p><sup>©RVC 2008</sup>
-Image:LH_Spleen_Mouse_Higher_Histology.jpg|<p>'''Megakaryocyte & macrophages (mouse)'''</p><sup>©RVC 2008</sup></gallery></center>
+Image:LH_Spleen_Mouse_Higher_Histology.jpg|<p>'''Megakaryocyte & macrophages (mouse)'''</p><sup>©RVC 2008</sup></gallery>
 ==Functions==
 <p>The spleen has a number of functions:
-*It filters the blood removing ageing [[Erythrocytes|erythrocytes]] and antigens
+*It filters the blood removing ageing [[Erythrocytes - WikiBlood|erythrocytes]] and antigens
-*It stores [[Erythrocytes|erythrocytes]] and [[Thrombocytes|platelets]]
+*It stores [[Erythrocytes - WikiBlood|erythrocytes]] and [[Thrombocytes - WikiBlood|platelets]]
-*[[:Category:Secondary Lymphoid Tissue|Secondary lymphoid organ]]</p>
+*[[Secondary Lymphoid Tissue - Anatomy & Physiology|Secondary lymphoid organ]]</p>
 ===Erythrocytes & Platelets===
-<p>In the foetus the spleen also has a role in [[Haematopoiesis - Overview|haematopoiesis]] when it becomes the main [[Erythrocytes|erythrocyte]] producing organ during the haematopoietic transitional phase.</p>
+<p>In the foetus the spleen also has a role in [[Overview of Haematopoiesis - WikiBlood|haematopoiesis]] when it becomes the main [[Erythrocytes - WikiBlood|erythrocyte]] producing organ during the hematopoietic transitional phase.</p>
-<p>In the developed animal the red pulp is involved in the removal of aged, damaged or abnormal [[Erythrocytes|erythrocytes]] (along with the [[Liver - Anatomy & Physiology|liver]] and [[Bone Marrow - Anatomy & Physiology|bone marrow]]). As [[Erythrocytes|erythrocytes]] age they become less supple and this causes them to become damaged when they pass through the very narrow capillaries of the spleen, after which they are phagocytised by splenic [[Macrophages|macrophages]]. If a splenectomy is performed the number of aged [[Erythrocytes|erythrocytes]] in circulation increases.</p>
+<p>In the developed animal the red pulp is involved in the removal of aged, damaged or abnormal [[Erythrocytes - WikiBlood|erythrocytes]] (along with the [[Liver - Anatomy & Physiology|liver]] and [[Bone Marrow - Anatomy & Physiology|bone marrow]]). As [[Erythrocytes - WikiBlood|erythrocytes]] age they become less supple and this causes them to become damaged when they pass through the very narrow capillaries of the spleen, after which they are phagocytised by splenic [[Macrophages - WikiBlood|macrophages]]. If a splenectomy is performed the number of aged [[Erythrocytes - WikiBlood|erythrocytes]] in circulation increases.</p>
-<p> The red pulp also acts as a storage site for [[Erythrocytes|erythrocytes]]. The degree of storage is variable between species but is particularly notable in horses which, during exercise under sympathetic activity, can contract their spleen to increase the concentration of circulating [[Erythrocytes|erythrocytes]]. In some species such as cats and rodents the red pulp acts as a storage site for [[Thrombocytes|platelets]] and contains [[Thrombopoiesis#Megakaryocyte|megakaryocytes]].</p>
+<p> The red pulp also acts as a storage site for [[Erythrocytes - WikiBlood|erythrocytes]]. The degree of storage is variable between species but is particularly notable in horses which during exercise under sympathetic activity can contract their spleen to increase the concentration of circulating [[Erythrocytes - WikiBlood|erythrocytes]]. In some species such as cats and rodents the red pulp acts as a storage site for [[Thrombocytes - WikiBlood|platelets]] and contains [[Thrombopoiesis - WikiBlood#Megakaryocyte|megakaryocytes]].</p>
 ===Lymphoid===
-<p>Blood flows through the marginal sinus. This means that most antigens present in the blood come into contact with the [[Lymphocytes#B cells|B lymphocytes]] and dendritic cells in the spleen. Dendritic cells in the marginal sinus and red pulp take up antigens from the blood and transport them to the primary follicles in the white pulp. If the antigen activates the [[Lymphocytes#B cells|B lymphocytes]] then a germinal centre will form in the primary follicle and this is called a splenic nodule. Antibody producing cells then migrate to the red pulp and marginal zone.</p>
+<p>Blood flows through the marginal sinus meaning that most antigens present in the blood come into contact with the [[Lymphocytes - WikiBlood#B cells|B lymphocytes]] and dendritic cells in the spleen. Dendritic cells in the marginal sinus and red pulp take up antigens from the blood and transport them to the primary follicles in the white pulp. If the antigen activates the [[Lymphocytes - WikiBlood#B cells|B lymphocytes]] then a germinal centre will form in the primary follicle and this is called a splenic nodule. Antibody producing cells then migrate to the red pulp and marginal zone.</p>
 <p>Following splenectomy this doesn’t occur and animals are predisposed to septicaemia and infection with blood [[Protozoa|protozoa]].</p>
-{{Template:Learning
-|videos = [[Video: Equine thoracic cavity dissection|Equine thoracic cavity dissection]]<br>[[Video: Feline Abdomen|Feline Abdomen]]<br>[[Video: Foal gastrointestinal tract potcast|Foal gastrointestinal tract potcast]]<br>[[Video: Ruminant abdomen potcast|Ruminant abdomen potcast]]<br>[[Video: Lateral view of the feline thorax and abdomen potcast|Video: Lateral view of the feline thorax and abdomen potcast]]<br>[[Video: Abdominal viscera of the horse dissection|Abdominal viscera of the horse dissection]]
-|OVAM = [http://www.onlineveterinaryanatomy.net/content/spleen-histology-low-power Spleen Histology - Low Power 1]<br>[http://www.onlineveterinaryanatomy.net/content/spleen-histology-low-power-0 Spleen Histology - Low Power 2]<br>[http://www.onlineveterinaryanatomy.net/content/spleen-histology-high-power Spleen Histology - High Power]<br>[http://www.onlineveterinaryanatomy.net/content/rodent-spleen-histology-0 Rodent Spleen Histology]
-}}
-{{Chapter}}
-{{Mansonchapter
-|chapterlink = http://www.mansonpublishing.co.uk/book-images/9781893441958_sample.pdf
-|chaptername = Spleen histology
-|book = Quick Look Series - Histology
-|author = Jo Ann Eurell
-|isbn = 9781893441958
-}}
 ==In pathology==
 ===Direct pathology===
 *Specific spleen pathology can be found [[Spleen - Pathology|here]]
-*[[Neoplasia - Pathology#Acute Undifferentiated Leukaemia|Acute undifferentiated leukaemia]] and [[Neoplasia - Pathology#Lymphoid Neoplasms|lymphoid neoplasms]]
+*[[General Pathology - Neoplasia#Acute Undifferentiated Leukaemia|Acute undifferentiated leukaemia]] and [[General Pathology - Neoplasia#Lymphoid Neoplasms|lymphoid neoplasms]]
 ===Changed or affected by===
-*[[Post-Mortem Change - Pathology#Agonal Changes|Post mortem change]]
+*[[General Pathology - Post-Mortem Change#Agonal Changes|Post mortem change]]
-*[[Haemangioendothelioma|Haemangioendotheliomas]], [[Neoplasia - Pathology#Pancreatic carcinoma|pancreatic carcinomas]] & [[Haemangiosarcoma|haemangiosarcomas]]
+*[[Endocardial - Pathology#Haemangioendothelioma|Haemangioendotheliomas]], [[General Pathology - Neoplasia#Pancreatic carcinoma|pancreatic carcinomas]] & [[Liver Proliferative - Pathology#Haemangiosarcoma|haemangiosarcomas]]
-*''[[Corynebacterium ovis]]'', [[Erysipelothrix rhusiopathiae#Swine erysipelas|swine erysipelas]], [[Francisella tularensis#Pathogenesis and pathogenicity|francisella tularensis]], [[Salmonella#Spleen|salmonella]], [[Salmonellosis|enteric salmonellosis]], [[:Category:Brucella species#Pathogenesis and pathogenicity|brucella]] & [[Yersinia#Clinical infections|yersinia]]
+*[[Lymphoreticular - bacterial diseases#Corynebacterium ovis|Corynebacterium ovis]], [[Erysipelothrix rhusiopathiae#Swine erysipelas|swine erysipelas]], [[Francisella tularensis#Pathogenesis and pathogenicity|francisella tularensis]], [[Salmonella#Spleen|salmonella]], [[Intestines Fibrinous/Haemorrhagic Enteritis - Pathology#enteric Salmonellosis|enteric salmonellosis]], [[Brucella species#Pathogenesis and pathogenicity|brucella]] & [[Yersinia#Clinical infections|yersinia]]
-*[[Poxviruses#Histopathology|Leporipoxviruses]] & [[Bovine Viral Diarrhoea Virus|bovine viral diarrhoea disease]]
+*[[Poxviruses#Histopathology|Leporipoxviruses]] & [[Cavity & Gingiva - Pathology#Erosive & Ulcerative Pathology|bovine viral diarrhoea disease]]
-*[[Pigmentation - Pathology#Haemosiderin|Haemolytic disorders]]
+*[[General Pathology - Pigmentation and Calcification#Haemosiderin|Haemolytic disorders]]
 ==References==
 <references/>
-<br><br>
-{{Jim Bee 2007}}
-==Webinars==
-<rss max="10" highlight="none">https://www.thewebinarvet.com/gastroenterology-and-nutrition/webinars/feed</rss>
-[[Category:Spleen]]

Difference between revisions of "Spleen - Anatomy & Physiology"

Revision as of 13:17, 12 August 2009

Contents

Introduction

Development

Structure

Red Pulp

White Pulp

Species Differences

Vasculature

Species Differences

Innervation

Histology

Functions

Erythrocytes & Platelets

Lymphoid

In pathology

Direct pathology

Changed or affected by

References

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