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A-Level Biology OCR A

Lymph Fluid Lymphatic System Nodes Describe Structure Function

The lymphatic system consists of blind-ended lymph capillaries carrying lymph unidirectionally back to the blood, and lymph nodes filtering pathogens and housing lymphocytes, with one-way valves for muscle-driven transport.

El sistema linfático consta de capilares linfáticos ciegos que transportan linfa unidireccionalmente de regreso a la sangre, y nódulos linfáticos que albergan linfocitos y filtran patógenos, con válvulas unidireccionales para el transporte muscular.

Front Describe structure and function of lymphatic system.
Back Lymphatic system:
  • System of blind-ended tubes - lymph capillaries that carry lymph that is tissue fluid that drained into this system in one direction, leads fluid back into blood into left/right subclavian vein
  • Lymph nodes along the vessels where lymphocytes build up when necessary to produce antibodies, they also intercept bacteria and other debris from lymph which are egested by phagocytes in nodes
  • One way valves are present, fluid transported by squeezing of body muscles

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