Immune response (lymphoid) system. Immune response system includes: Diffuse lymphoid infiltration...
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- Immune response (lymphoid) system
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- Immune response system includes: Diffuse lymphoid infiltration
Lymphoid follicles (nodules) MALT, GALT, BALT Tonsils (Waldeyers
ring) Lymph nodes Spleen Thymus gland Red bone marrow
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- Waldeyers ring: Palatine tonsils (paired) Tubal tonsils
(paired) Pharyngeal tonsil (single) Lingual tonsil (single)
Laryngeal tonsil (occasional) Tonsillar structure: Crypts
Epithelial lining Lymphoid nodules (follicles) surrounding
crypts
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- Lymph node structure: Cortex (Lymphoid nodules with germinal
centers) Paracortex (Deep cortex, T-lymphocytes) Medulla (Medullary
cords) Sinuses: Marginal (subcapsular) Cortical (paratrabecular)
Medullary Hilary
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- Spleen structure: White pulp Lymphatic nodules with central
arteries Periarterial lymphatic sheaths (PALS) Red pulp Trabecules
with arteries and veins Cords of Billroth
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- Thymus gland structure: Thymic lobule is a structural unit,
consisting of epithelioreticulocytes infiltrated with thymocytes
(T-lymphocytes). Each lobule includes: Cortex + Medulla (including
Hassal corpuscles) During ageing thymus undergoes involution
resulting in transformation into corpus adiposum Under stressfull
conditions thymus undergoes accidental involution
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- Red bone marrow: Location: flat bones and epiphysial parts of
long bones Structure: Osseous trabecules of spongy bones Reticular
connective tissue Pluripotent hemopoetic cells with clasters of
differentiating red and white blood cells
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