Lymphatic system

• Consists of organs, ducts and nodes - Transports watery clear fluid called lymph

• Collect + returns interstitial fluid, including plasma protein to the blood- maintaining fluid balance. • Defend the body against disease by transporting lymphocytes. • Absorb lipids from the intestine and transport them to the blood.

• begin as blind ended tubes - Valves in capillary walls are pushed open by interstitial fluid which moves into the vessel

• Capillaries join to larger vessels called lymphatic vessels. • Lymph is moved along the vessel by surrounding muscle contractions. • Also have valves (like veins) to prevent backflow.

Located along lymph vessels. Filters lymph fluid. Contains lymphocytes to help fight infections. Found in clumps in the neck, under the arms and in the groin.