General Science • BiologyMedium
What is the primary function of lymphatic vessels and lymph nodes in the human body?
A. Pumping oxygenated blood directly to skeletal muscles
B. Filtering interstitial fluid, mounting immune responses, and returning excess tissue fluid to the circulatory system✓ Correct Answer
C. Synthesizing digestive enzymes for lipid metabolism
D. Producing red blood cells and platelets throughout adult life
💡 Solution & Explanation
The lymphatic system collects excess interstitial fluid from tissues, filters it through lymph nodes where lymphocytes destroy pathogens and foreign antigens, and returns the purified fluid back to the blood vascular system near the heart. Red blood cell and platelet production occurs primarily within red bone marrow. The spleen acts as a secondary lymphoid organ filtering blood. Immunity involves both innate and adaptive defense mechanisms.
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