IMMUNOLOGY

Detailed explanation-1: -Lymphocytes develop in the thymus and bone marrow (yellow), which are therefore called central (or primary) lymphoid organs.

Detailed explanation-2: -Lymph nodes are small bean-shaped tissues found along the lymphatic vessels. The lymph nodes act as filters.

Detailed explanation-3: -The lymphatic system also helps defend the body against germs (viruses, bacteria, and fungi) that can cause illnesses. Those germs are filtered out in the lymph nodes, small clumps of tissue along the network of lymph vessels. Inside the lymph nodes, lymphocytes called T-cells and B-cells help the body fight infection.

Detailed explanation-4: -The lymph nodes monitor the lymph flowing into them and produce cells and antibodies which protect our body from infection and disease. The spleen and thymus are lymphatic organs that monitor the blood and detect and respond to pathogens and malignant cells.

Detailed explanation-5: -Tonsils and adenoid: These lymphoid organs trap pathogens from the food you eat and the air you breathe. They are your body’s first line of defense against foreign invaders. Bone marrow: This is the soft, spongy tissue in the center of certain bones, such as the hip bone and breastbone.