Lymphatic System Lymphatic System Functions Immunity Lipid transport

Lymphatic System

Lymphatic System • Functions – Immunity – Lipid transport from digestive system – Drains interstitial fluid back to blood

Lymphatic System

Lymphatic System • Components

Lymphatic System • Components – Lymphatic tissue

Lymphatic System • Components – Lymphatic tissue • Macrophages

Lymphatic System • Components – Lymphatic tissue • Macrophages • T cells

Lymphatic System • Components – Lymphatic tissue • Macrophages • T cells

Lymphatic System • Components – Lymphatic tissue • Macrophages • T cells • B cells

Lymphatic System • Components – Lymphatic tissue • Macrophages • T cells • B cells

Lymphatic System • Components – Lymphatic tissue • Macrophages • T cells • B cells • Reticular CT framework

– Lymphatic organs

– Lymphatic organs • Composed of lymphatic tissue

– Lymphatic organs • Composed of lymphatic tissue surrounded by CT capsule

– Lymphatic organs • Composed of lymphatic tissue surrounded by CT capsule – lymph nodes

– Lymphatic organs • Composed of lymphatic tissue surrounded by CT capsule – lymph nodes – spleen

– Lymphatic organs • Composed of lymphatic tissue surrounded by CT capsule – lymph nodes – spleen – thymus gland

– Lymphatic nodules

– Lymphatic nodules • Small clumps of lymphatic tissue

– Lymphatic nodules • Small clumps of lymphatic tissue not surrounded by a CT capsule

– Lymphatic nodules • Small clumps of lymphatic tissue not surrounded by a CT capsule – MALT

– Lymphatic nodules • Small clumps of lymphatic tissue not surrounded by a CT capsule – MALT – tonsils

– Lymphatic nodules • Small clumps of lymphatic tissue not surrounded by a CT capsule – MALT – tonsils – Peyer’s patches

– Lymphatic circulation • Function: transports lymph • Composition: – lymphatic capillaries – lymphatic vessels » lymphatic trunks » lymphatic ducts

• Lymphatic Drainage

• Lymphatic Drainage – Excessive interstitial fluid enters lymphatic capillaries

• Lymphatic Drainage – Excessive interstitial fluid enters lymphatic capillaries

• Lymphatic Drainage Lymphatic capillaries Lymphatic trunks Lymphatic ducts

• Lymphatic Drainage –Lymph flow promoted by

• Lymphatic Drainage –Lymph flow promoted by • Skeletal muscle contraction

• Lymphatic Drainage –Lymph flow promoted by • Skeletal muscle contraction • Breathing movements

• Consequences of lymphatic obstruction?

• Lacteals – Special lymphatic capillaries in the villi of small intestine – Site of lipid absorption – Beginning of lipid transport from digestive system back to blood

• Nervous System -------------------