IMMUNOLOGY

Detailed explanation-1: -Afferent lymph vessels bring lymph to a lymph node, and efferent lymph vessels carry lymph away from a lymph node. The lymph flows from efferent lymph vessels to another lymph node, which returns to a vein and then to a bigger lymph duct, which drains the lymph into other veins and sends it to the body.

Detailed explanation-2: -Lymph vessels that carry lymph to a lymph node are called afferent lymph vessels, and those that carry it from a lymph node are called efferent lymph vessels, from where the lymph may travel to another lymph node, may be returned to a vein, or may travel to a larger lymph duct.

Detailed explanation-3: -Afferent lymphatic vessels flow into a lymph node and carry unfiltered lymph fluid. Efferent lymphatic vessels flow out of a lymph node and carry filtered lymph fluid. Lymph vessels that leave the thymus or spleen (which lack afferent vessels) also fall into this category.