Statement I:  Lymph nodes are small, solid structures located along the lymphatic system.

Statement II: Lymph nodes function as filters for lymph fluid, capturing bacteria, viruses, and other antigens. The trapped antigens are then targeted and eliminated by lymphocytes

Both statement I and statement II are correct .

Lymph nodes are small, solid structures that are distributed throughout the lymphatic system in the human body. They serve as important components of the immune system. The primary function of lymph nodes is to filter lymph fluid as it circulates through the body.

Lymph fluid, which contains various substances such as white blood cells, proteins, and cellular debris, is collected from tissues and organs by lymphatic vessels and transported towards the lymph nodes. As the lymph fluid passes through the lymph nodes, specialized cells within the nodes, including lymphocytes, macrophages, and dendritic cells, actively interact with the fluid.

The lymph nodes act as filters, trapping foreign substances such as bacteria, viruses, and other antigens that may be present in the lymph fluid. These antigens can include pathogens or other harmful substances that enter the body. The antigens are recognized by lymphocytes, which are a type of white blood cell specialized in immune responses. Lymphocytes mount an immune response against the captured antigens, initiating processes that lead to their destruction or neutralization.

In this way, lymph nodes play a crucial role in the immune response by helping to eliminate harmful substances and pathogens from the body. They serve as sites where lymphocytes can encounter antigens, triggering an immune response and facilitating the production of specific immune cells and antibodies.

Overall, the lymph nodes are vital components of the immune system, contributing to the body's defense against infections and diseases. They help to prevent the spread of pathogens throughout the body by filtering and targeting antigens present in the lymph fluid.