Immune system and lymphoid organs

Nodules are present in
Spleen
Thymus
Tonsil
Lymph nodes
Paracortex of the lymph node consist of
T cell
B cell
APCs
Macrophages
Lymphoid organ responisble for cleaning the blood, elimination of the defunct red blood cells is
Spleen
Tonsil
Thymus
Lymph node
What is true
Tonsils are un-capsuled and peripheric
Spleen are capsuled and peripheric
Lymph nodes are capsuled and central
Thymus is central
What is true
T cells are 70% of lymphocytes in blood
B cells are 10% of lymphocytes
NK cell originate from bone marrow
Thymus originate from endoderm
Which cells are not APC
Dendritic
T cell
B cell
Langerhans
Macrophage
The thymus
CT septa divides organ in incomplete lobules
Medulla contains Tcell precursor called thymocyte
B cell aggregation in medulla
Thymus blood barrier-Tcells leave thymus
Maximal developement during adulthood
Red pulp
Lymphatic nodle
Central artery
PALS
Paracortex
Outer cortex lymoh node
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