lymphatic system Flashcards
Hassall´s corpuscles are found in the cortex of the Thymus
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Hassall´s corpuscles are located in the medulla of the Thymus
t
Hassall´s corpuscles are located in the medulla of the Thymus
t
Epithelial reticular cells form a supporting network of developing (=immature) Tlymphocytes in the Cortex of Th
t
Epithelial reticular cells of thymus together with the endothelium of cortical capillaries
form a blood-thymus barrier
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Reticuloepithelial cells form the inner stroma of thymus
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Fibrous septa divide the parenchyma of thymus into incomplete lobules
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The medulla of Thymus does NOT contain any mature T-lymphocytes
f
The medulla of Thymus appears lighter than cortex using HE-staining
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Thymus contains many lymphoid nodules
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Medulla of lymph node contains also the lymphoid nodules
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Medulla of Lymph node consists of sinusoids and cords of Billroth
f
Medullary cords of the lymph node are composed of the reticular epithelium and
lymphocytes
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The cortex of lymph nodes contain mainly structures with a predominance of Blymphocytes
t
The cortex of lymph nodes contains mainly lymph nodules and reticular ligament
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Both cortex and paracortex of the lymph node are composed of lymphoid nodules
containing predominantly B-Lymphocytes
f
T-lymphocytes and no B-lymphocytes are found in the paracortex of Lymph node
T
A lymph node paracortex comprises T-cells, macrophages and dendritic cells
T
Paracortex of lymph node contains high endothelial venules (HEV) and is T-dependent
zone
T
Lymph race flows inside the lymph node through the system of cortical and medullar
sinuses
T
Lymph flows inside the lymph node through a system of cortical and medullary sinuses
T
The lymph node is covered by a capsule containing predominantly type I collagen
T
The lymph node stroma is formed by the reticulum epithelium
f
Lymph nodules in all secondary lymphatic organs are also referred to as Malpighi´s bodies
f
The internal fine stroma of the lymph node is formed by both reticular cells and reticular
fibres
t
Lymphoid nodules are found in the appendix, lymph node, spleen and palatine tonsil
t
Primary lymphoid nodule comprises pale stained germinal centre as a result of B-cells
activation
f
Lymph nodes in all secondary organs are also referred to as Malpighi bodies (corpuscles)
f
The internal stroma of the Spleen is formed by loose collagenous CT
f
Lymphoid nodules in the Spleen are also referred to as Malpighian corpuscles
t
Splenic cords of Billroth are a part of the white pulp
f
Splenic cords of Billroth are made up of the reticular tissue, immune cells and blood
elements
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Cords of Billroth are part of the red pulp of the spleen
t
The marginal zone separates the white pulp from the red pulp of the spleen
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White pulp of Spleen consists only of B-lymphocytes
f
T-lymphocytes mature in the Spleen
f
Hassall bodies are a characteristic part of the white pulp of the spleen
f
The periarteriolar lymphoid sheath (PALS) surrounding the central arteriole in spleen
consists of T-lymphocytes
t
Oral surface of the Tonsilla palatina is covered by fibrous capsule
f
Many lymphoid nodules are present beneath the stratified squamous epithelium of
palatine tonsils
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Tonsilla palatina is lined with a stratified cylindrical epithelium with cilia and goblet cells
f
Secondary lymph nodes are located under the stratified squamous nonkeratinized
epithelium inside the palatine tonsil
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Under the layered flat non-horned epithelium inside the Tonsilla palatina there are
secondary lymph nodules
t
The internal fine stroma of the palatine tonsil consists of reticular cells and reticular fibres
containing type III collagen
t
T-lymphocytes are generally bigger than B-lymphocytes in regions with lymphatic tissue
f
Both B-and T-lymphocytes migrate directly from the bone marrow to the secondary
lymphoid organs where they perform their specific functions
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T-helper lymphocytes produce interleukins
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