Question

How many lymph nodes are there in the human body?

Answer 1

The lymphatic system's kidney-shaped organ is known as a lymph node. Lymph nodes play a crucial role in the immune system's correct functioning. Different disorders cause lymph nodes to expand or become irritated. In cancer staging, the condition of the lymph nodes is extremely important.
Lymphadenopathy refers to the swelling of lymph nodes. Swelling can be caused by a variety of factors, including infections, tumours, autoimmune illness, and other factors. A lymph node is made up of lymphoid tissue, which is made up of a meshwork of fibres termed reticulum that contains white blood cells.

Complete answer:
Between $500$ and $600$ lymph nodes are found throughout the human body. Large clusters of nodes grow over the chest, neck, groyne, and belly.
Lymph nodes can be found all over the body. Lymph nodes are made up of lymphocytes, which are white blood cells that include both B and T cells. Multiple afferent lymphatic vessels allow lymph to enter a lymph node. B cells produce antibodies, which circulate in the bloodstream and bind to targets, triggering an immunological response.
Antigens found in cells go through the lymphatic system to lymph nodes. T cells are given the antigen. T cells play an important role in cell-mediated immunity.
Filter lymph to find and fight infection: The most important job of lymph nodes is to collect and kill germs. The lymph nodes filter and kill unwanted things such as germs.

Note:
The lymphatic system, also known as the lymphoid system, is the body's drainage system. In vertebrates, it is an organ system that is a part of the circulatory and immunological systems. A wide network of lymphatic veins, lymphatic or lymphoid organs, and lymphoid tissues make up the lymphatic system. These veins transport lymph fluid, a transparent fluid, to the heart.
The lymphatic system has two primary functions:
1. The lymphatic system is in charge of removing extracellular fluid from tissues.
2. It also carries white blood cells into the bones from lymph nodes.