T Level Biology Practice Test

Question: 1 / 400

What is the primary function of lymph nodes in the body?

Store fat

Filter substances in the lymphatic fluid

The primary function of lymph nodes is to filter substances in the lymphatic fluid. Lymph nodes are small, bean-shaped structures located throughout the lymphatic system. They play a crucial role in the immune system by acting as a checkpoint for lymph fluid. As lymph flows through the nodes, they are responsible for trapping and filtering out harmful substances such as bacteria, viruses, and foreign particles. This process helps prevent infections and supports the body in mounting an immune response.

Additionally, lymph nodes contain immune cells, such as lymphocytes, which can react to pathogens and help fight infections. This filtering and immune function makes lymph nodes vital for maintaining health and responding to illnesses.

While the other options highlight processes occurring in the body, they do not pertain to the specific filtering function of lymph nodes.

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Produce hormones

Produce red blood cells

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