Immune response (lymphoid) system. Immune response system includes: Diffuse lymphoid infiltration Lymphoid follicles (nodules) MALT, GALT, BALT Tonsils.

Immune response (lymphoid) system

Immune response system includes: Diffuse lymphoid infiltration Lymphoid follicles (nodules) MALT, GALT, BALT Tonsils (Waldeyers ring) Lymph nodes Spleen Thymus gland Red bone marrow

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

Lymph node structure: Cortex (Lymphoid nodules with germinal centers) Paracortex (Deep cortex, T-lymphocytes) Medulla (Medullary cords) Sinuses: Marginal (subcapsular) Cortical (paratrabecular) Medullary Hilary

Spleen structure: White pulp Lymphatic nodules with central arteries Periarterial lymphatic sheaths (PALS) Red pulp Trabecules with arteries and veins Cords of Billroth

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

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

Immune response (lymphoid) system. Immune response system includes: Diffuse lymphoid infiltration Lymphoid follicles (nodules) MALT, GALT, BALT Tonsils.

Documents

accidental involution

veins cords of billroth

cortex lymphoid nodules

thymus gland structure

spleen structure

lymph node structure

white pulp lymphatic

ageing thymus