IMMUNOLOGY

Detailed explanation-1: -Secondary lymphoid organs: These organs include the lymph nodes, the spleen, the tonsils and certain tissue in various mucous membrane layers in the body (for instance in the bowel). It is in these organs where the cells of the immune system do their actual job of fighting off germs and foreign substances.

Detailed explanation-2: -The spleen is a fist-sized organ found in the upper left side of your abdomen, next to your stomach and behind your left ribs. It’s an important part of your immune system but you can survive without it. This is because the liver can take over many of the spleen’s functions.

Detailed explanation-3: -The spleen filters blood in much the way that the lymph nodes filter lymph. Lymphocytes in the spleen react to pathogens in the blood and attempt to destroy them. Macrophages then engulf the resulting debris, the damaged cells, and the other large particles.

Detailed explanation-4: -The spleen and lymph nodes are two major secondary lymphoid organs that play key roles in: Filtering out and destroying unwanted pathogens; Maintaining the population of mature lymphocytes (which are white blood cells) to enable the adaptive immune response to begin.

Detailed explanation-5: -The spleen makes lymphocytes, filters the blood, stores blood cells, and destroys old blood cells. It is located on the left side of the abdomen near the stomach. Enlarge. Anatomy of the lymph system showing the lymph vessels and lymph organs, including the lymph nodes, tonsils, thymus, spleen, and bone marrow.