MICROANATOMY

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 small organ inside your left rib cage, just above the stomach. It’s part of the lymphatic system (which is part of the immune system). The spleen stores and filters blood and makes white blood cells that protect you from infection. Many diseases and conditions can affect how the spleen works.

Detailed explanation-3: -The secondary lymphoid organs are the organs in which lymphocytes mature or prepare for attacking. The main secondary lymphoid organs are lymph nodes, spleen and tonsils. So, our first option is the liver, which is the largest gland of the human body, not the largest lymphoid organ. Second option is a kidney.