Lymphatic System

Anatomy

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Function

Immune defenses

Disorders

Return clean fluids and leaked proteins back to the blood

Drain excess fluid from the tissue

Play an essential role in the body defenses and resistance to diseases.

Lymphatic vessels

Lymphoid organs

Efferent lymphatic vessel

Lymph trunks

Thymus

Bone Marrow

Spleen

Lymph node

MALT

Includes peyers pathches,tonsils,appendix and any other small collections of lymphoid tissue

Important in protection of the digestive and reproductive tracts.

Lymph ducts

Afferent lymphatic vessel

Lymph capillaries

Walls overlap to form flap-like mini-valves which allows lymph to enter/Are anchored to C.T by filaments

Brings lymph into the lymph node

Monitors and filters lymph

Moves lymph away from the lymph node

Collects lymph from collecting vessels

Returns fluid to circulatory vein(subclavin vein)

Peyer's Patches

Tonsils

Lymphocytes

Found in walls of small intestine/Captures and destroys bacteria in the intestine

Site of T lymphocyte and produces thymosin

Site of blood cells and immature lymphocyte formation and B lymphocyte maturation

Filters blood/destroys worn out cells/Forms blood cells in the fetus

Trap and remove bacteria and foreign materials

Mucosa associated lymphatic tissue