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Produces lymphocytes and other blood cells, vital for creating the cellular components of the immune system.

Inner part of the lymph node with medullary cords that contain plasma cells, macrophages, and lymphocytes.

Contribute to immune response by producing antibodies and destroying infected cells.

Trap pathogens from food or air and activate lymphocytes.

Site of T-cell maturation and selection, critical for developing the adaptive immune response.

Outer part of the lymph node containing follicles with germinal centers, B cells, and other immune cells.

Absorb interstitial fluid and route it back towards the bloodstream.

Receives lymph from the lower body and is the starting point of the thoracic duct.

Sites within lymph nodes where B cells proliferate and antibody responses are initiated.

Transport the lymph towards lymph nodes and eventually into the larger lymphatic ducts.

Prevent backflow of lymph within lymphatic vessels and ensure unidirectional flow.

Filters blood, destroys old red blood cells, and helps mount an immune response to blood-borne pathogens.

Specialized lymph capillaries in the intestines that absorb dietary fats.

Carries lymph from the lower and left side of the body into the bloodstream.

Carry lymph into a lymph node to be filtered.

Filter lymph and assist immune response by trapping pathogens and facilitating the activation of lymphocytes.

Transport filtered lymph away from the lymph node.

Protects the mucous membranes of the digestive, respiratory, genital, and urinary tracts from pathogens.

Monitor intestinal bacteria populations and prevent the growth of pathogenic bacteria in the intestines.