What is a primary function of the human lymphatic system?

Explanation

The lymphatic system helps drain excess fluid from body tissues and return it to the bloodstream, while also playing a key role in the immune system by filtering harmful substances and pathogens through structures called lymph nodes. Immune cells within the lymph nodes help detect and respond to infections, which is why lymph nodes can become swollen and tender during an illness. Unlike the circulatory system, the lymphatic system does not have a central pump like the heart and instead relies partly on muscle movement to help circulate lymph fluid. Explore more Everyday Science MCQs on mcqstutor to keep practicing.