GENERAL HISTOLOGY

Detailed explanation-1: -Medulla. Phagocytic macrophages are located in the central medulla of the lymph node.

Detailed explanation-2: -The lymphatic system is part of the immune system. It keeps body fluid levels in balance and defends the body against infections. Lymphatic (lim-FAT-ik) vessels, tissues, organs, and glands work together to drain a watery fluid called lymph from throughout the body.

Detailed explanation-3: -Lymph nodes contain phagocytic cells which act as filters, trapping bacteria and other microorganisms that cause disease. If you have had “swollen glands”, then your lymph nodes were swollen in your neck, helping trap and destroy bacteria and other pathogens.

Detailed explanation-4: -In immunology and anatomy textbooks the bone marrow is described as a typical “primary lymphoid organ” producing lymphoid cells independent of antigens. The hematopoietic bone marrow is largely age-dependent organ with great anatomical and functional differences among various species.