GENERAL HISTOLOGY

Detailed explanation-1: -Lymph nodes are small bean-shaped tissues found along the lymphatic vessels. The lymph nodes act as filters. Various immune system cells trap germs in the lymph nodes and activate the creation of special antibodies in the blood.

Detailed explanation-2: -Lymph nodes filter substances that travel through the lymphatic fluid, and they contain lymphocytes (white blood cells) that help the body fight infection and disease.

Detailed explanation-3: -It’s needed there because those systems are exposed to the external environment. This lymphatic tissue plays a very important role in the defence of our body. The most important sites of this lymphoid tissue are in the throat (called the tonsils), in the intestine area (called Peyer’s patches) and in the appendix.

Detailed explanation-4: -During steady state, lymph nodes maintain peripheral tolerance. Upon activation, lymph nodes quickly initiate protective adaptive immunity to produce antibody, cytotoxic immune cells and memory against the invading foreign antigens.