In the lymph node, the senescent cells mainly appeared in the zone between lymph nodules, and in the medullary cord and sinus.

Lymphatic system: system of lymph nodes, vessels, and nodules and lymphoid tissue, including the thymus, spleen, tonsils, and bone marrow, through which lymph circulates and is filtered.

There are lymphatic tissue cords, connective tissue cords and intercord lymph sinus and lymphatic nodules also in the loose areas.